Inflammation and Anti-inflammatory Drugs

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which statement best describes the primary function of inflammatory mediators in vascularized connective tissue following a cell injury?

  • To immediately halt all biological processes in the injured area to prevent further damage.
  • To initiate the inflammatory response by eliminating the cause of cell injury and clearing debris. (correct)
  • To directly repair damaged cells by synthesizing new cellular components.
  • To induce a state of permanent cellular dormancy to avoid potential complications.

Why are anti-inflammatory drugs indicated for chronic inflammatory conditions?

  • They stimulate inflammatory processes to promote faster healing.
  • They enhance the body's natural ability to tolerate chronic pain without addressing the inflammation.
  • They directly target and eliminate the underlying cause of the inflammation.
  • They control the inflammatory process, reducing pain and inflammation. (correct)

What vascular changes are responsible for the clinical signs of redness and heat associated with inflammation?

  • Decreased production of local chemical mediators or cytokines by damaged cells.
  • Vasodilation, which accommodates an increase in blood flow or hyperemia. (correct)
  • Increased blood vessel wall permeability, leading to reduced blood flow.
  • Vasoconstriction, which decreases blood flow to the site of injury.

How do local chemical mediators or cytokines contribute to the processes of swelling and pain during inflammation?

<p>They increase the permeability of vascular endothelium, allowing exudation of plasma. (A)</p> Signup and view all the answers

What is the initial vascular response during the acute phase of inflammation following tissue damage or pathogen introduction?

<p>Arterioles dilate, and endothelial cells shrink increasing capillary permeability. (B)</p> Signup and view all the answers

What is the role of chemotactic mediators in the cellular phase of acute inflammation?

<p>To target leukocytes, causing them to adhere to endothelium and migrate into tissues. (A)</p> Signup and view all the answers

How do activated macrophages contribute to the acute-phase response in the tissue healing (granular) phase of inflammation?

<p>They secrete proinflammatory cytokines (IL-1, IL-6, TNF-α) that induce coagulation and increase vascular permeability. (C)</p> Signup and view all the answers

What physiological processes can lead to chronic inflammation?

<p>Autoimmune diseases, cancers, and unresolved or repeated exposure to offending elements. (C)</p> Signup and view all the answers

What role do fibroblasts play in chronic inflammation, and what is the potential consequence of their activity?

<p>They replace damaged tissue leading to fibrosis, which can interfere with normal tissue function. (C)</p> Signup and view all the answers

What is a key characteristic found in granulomas associated with chronic inflammation?

<p>A mass of cells consisting of activated macrophages surrounded by activated lymphocytes. (B)</p> Signup and view all the answers

How do NSAIDs and corticosteroids differ in their mechanism of action regarding the phases of inflammation?

<p>NSAIDs inhibit the vascular phase, while corticosteroids inhibit primarily the cellular phase. (B)</p> Signup and view all the answers

How do corticosteroids affect the immune responses of lymphocytes, and why is this clinically important?

<p>Corticosteroids profoundly alter the immune responses of lymphocytes, which is important for their anti-inflammatory and immunosuppressive actions. (A)</p> Signup and view all the answers

How do corticosteroids and NSAIDs differ in their mechanisms of action within the arachidonic acid cascade?

<p>Corticosteroids prevent the liberation of arachidonic acid, while NSAIDs target cyclooxygenase (COX). (C)</p> Signup and view all the answers

What physiological response do corticosteroid medications mimic, and when might extra doses be prescribed?

<p>They mimic the cortisol surge during stressful events, with extra doses given during severe infection or surgery. (B)</p> Signup and view all the answers

How does local administration of corticosteroids, such as injections into a joint, minimize serious side effects, compared to systemic administration?

<p>Local administration produces a high local concentration of the steroid, often without enough systemic absorption. (B)</p> Signup and view all the answers

What is the primary mechanism by which corticosteroids reduce inflammation?

<p>By suppressing the migration of polymorphonuclear leukocytes and reversing increased capillary permeability. (A)</p> Signup and view all the answers

What are some mechanisms involved in the suppression of inflammation by corticosteroids?

<p>Decreased release of vasoactive factors, diminished secretion of lipolytic enzymes, and decreased leukocyte extravasation. (C)</p> Signup and view all the answers

Why is tapering required when discontinuing corticosteroid therapy that has lasted longer than 7 days?

<p>To prevent acute adrenal crisis due to the adrenal cortex not immediately resuming corticosteroid production. (D)</p> Signup and view all the answers

What is the potential risk associated with high-dose, long-term corticosteroid use, particularly regarding bone health?

<p>Avascular necrosis, especially of the head of the femur and humerus, potentially leading to bone collapse. (B)</p> Signup and view all the answers

What could happen if a patient taking exogenous corticosteroids abruptly stops their medication?

<p>The patient may experience acute adrenal insufficiency, including symptoms like nausea and low blood pressure. (A)</p> Signup and view all the answers

Why are NSAIDs a necessary choice in pain management?

<p>They play an integral role in the COX pathway in inflammation and biochemical recognition of pain. (D)</p> Signup and view all the answers

What is a significant concern associated with the use of selective cyclooxygenase-2 (COX-2) inhibitor NSAIDs?

<p>They have a higher incidence of cardiovascular thrombotic events compared to nonselective NSAIDs. (D)</p> Signup and view all the answers

What are the advantages and disadvantages of topical NSAIDs compared to oral NSAIDs?

<p>Topical NSAIDs have similar efficacy with fewer gastrointestinal side effects, but cardiovascular and renal safety profiles need assessment. (A)</p> Signup and view all the answers

How do NSAIDs affect pain pathways, and what is their impact on inflammatory hyperalgesia and allodynia?

<p>NSAIDs reduce prostaglandin synthesis, decreasing inflammatory hyperalgesia and allodynia. (A)</p> Signup and view all the answers

Why are NSAIDs generally avoided in patients with advanced hepatic or renal disease?

<p>Because they have altered pharmacokinetic effects that can potentiate increased adverse pharmacodynamic effects, including risk of bleeding and acute kidney injury. (C)</p> Signup and view all the answers

What is the consequence of NSAIDs blocking COX-1 enzymes in the context of stomach health?

<p>They increase the risk of stomach ulcers and gastrointestinal bleeding. (D)</p> Signup and view all the answers

Why should safety concerns exist for NSAID use in patients with, or at elevated risk for, cardiovascular disease?

<p>Some NSAIDs, along with some of the nonselective COX-inhibitor NSAIDs, were found to increase the risk of heart attacks. (B)</p> Signup and view all the answers

How can corticosteroids affect normal lactation after birth, and is this effect reversible?

<p>Corticosteroid use can disturb normal lactation, but this is reversible after stopping use of the medication. (B)</p> Signup and view all the answers

What are the indications for prescribing short-term administration of corticosteroids?

<p>Acute and subacute bursitis, acute nonspecific tenosynovitis, ankylosing spondylitis, epicondylitis, and various types of arthritis. (B)</p> Signup and view all the answers

During post-injury acute inflammation, what is the purpose of chemotaxis?

<p>Guiding leukocytes to the injury site for pathogen elimination and tissue repair. (A)</p> Signup and view all the answers

What distinguishes chronic inflammation from acute inflammation in terms of cellular activity and tissue changes?

<p>Chronic inflammation centers around macrophage and lymphocyte accumulation, leading to fibrosis, while acute inflammation is marked by a rapid onset and resolution. (C)</p> Signup and view all the answers

Why is it essential to administer certain corticosteroids with food?

<p>To reduce gastrointestinal upset, as some can cause stomach irritation. (D)</p> Signup and view all the answers

How can chronic opioid use impact the effectiveness of NSAIDs in pain management?

<p>Chronic opioid use can lead to tolerance, thus NSAIDs can be co-administered to reduce the opioid dose needed for pain control. (D)</p> Signup and view all the answers

When patients are on long-term corticosteroid therapy, what condition can result from the combination of hypothalamic CRH reduction, ACTH reduction, and the adrenal glands stopping cortisol production?

<p>Addison's Disease (C)</p> Signup and view all the answers

How can topical NSAIDs benefit a patient struggling with osteoarthritis over systematic oral medications?

<p>Efficacy is still met and patients receiving topical NSAIDs has shown fewer GI side effects compared with those using oral formulations. (D)</p> Signup and view all the answers

The NSAID medication Naproxen has what kind of cardiac profile?

<p>Neutral-positive (B)</p> Signup and view all the answers

High cortisol levels, fatty (buffalo) hump between the shoulders, a round face, weight gain, irregular menstrual cycles, fatigue and depression are symptoms of what syndrome?

<p>Cushing’s syndrome (hypercortisolism) (D)</p> Signup and view all the answers

Which of the following accurately describes the role of cytokines in the inflammatory process?

<p>They mediate vascular changes like vasodilation and increased permeability, and sensitize nerve endings to enhance pain. (C)</p> Signup and view all the answers

In chronic inflammation, which process directly interferes with normal tissue function due to excessive production of growth factors?

<p>Fibrosis, which is excessive deposition of fibrous tissue. (C)</p> Signup and view all the answers

How do corticosteroids primarily influence the inflammatory process to reduce inflammation?

<p>By preventing the release of arachidonic acid, reducing the synthesis of eicosanoids. (C)</p> Signup and view all the answers

What is the MOST significant risk associated with abruptly discontinuing long-term corticosteroid therapy?

<p>Acute adrenal insufficiency, due to the suppressed hypothalamic-pituitary-adrenal axis. (C)</p> Signup and view all the answers

Why are corticosteroids sometimes administered in higher doses during acute stress or surgery for patients on long-term therapy?

<p>To mimic the natural cortisol surge produced by the body during stressful events, facilitating healing. (A)</p> Signup and view all the answers

How do nonselective NSAIDs exert their effects on pain and inflammation?

<p>By inhibiting both COX-1 and COX-2 enzymes, impairing the production of prostaglandins and thromboxanes. (B)</p> Signup and view all the answers

What is the PRIMARY reason that some highly selective COX-2 inhibitor NSAIDs were withdrawn from the market?

<p>A higher incidence of cardiovascular thrombotic events compared to nonselective NSAIDs. (B)</p> Signup and view all the answers

Which statement accurately describes the mechanism by which NSAIDs reduce pain and inflammation at the cellular level?

<p>NSAIDs decrease the recruitment of leukocytes and reduce the production of leukocyte-derived inflammatory mediators. (A)</p> Signup and view all the answers

How does food intake affect the absorption of orally administered NSAIDs, and what is its clinical significance?

<p>Food intake variably delays the absorption and systemic availability of NSAIDs, which may affect the timing of pain relief. (C)</p> Signup and view all the answers

In patients with advanced hepatic or renal disease, what is the PRIMARY concern regarding the use of NSAIDs?

<p>Altered pharmacokinetic effects of NSAIDs leading to increased adverse pharmacodynamic effects. (A)</p> Signup and view all the answers

What is the rationale behind co-administration of NSAIDs with opioids for pain management?

<p>NSAIDs allow for a reduction in the opioid dose needed for sufficient pain control, thus reducing the likelihood of adverse opioid effects. (B)</p> Signup and view all the answers

How do topical NSAIDs compare to oral NSAIDs regarding systemic exposure and potential side effects?

<p>Topical NSAIDs have decreased systemic exposure compared to oral NSAIDs, potentially causing fewer serious side effects. (D)</p> Signup and view all the answers

Which of the following best explains why NSAIDs are typically ineffective in treating neuropathic pain?

<p>Neuropathic pain involves different pain pathways that are not effectively modulated by NSAIDs. (C)</p> Signup and view all the answers

What is the main difference between acute and chronic inflammation in terms of cellular involvement and tissue changes?

<p>Acute inflammation involves rapid onset and resolution with minimal tissue damage, whereas chronic inflammation results in accumulation of macrophages, lymphocytes, and fibrosis. (D)</p> Signup and view all the answers

What is the underlying mechanism by which chronic use of high-dose corticosteroids can lead to avascular necrosis, particularly in the head of the femur and humerus?

<p>Corticosteroids increase lipid levels in the blood, potentially reducing blood flow and leading to avascular necrosis. (B)</p> Signup and view all the answers

What is the primary concern regarding the use of corticosteroids during pregnancy, especially in the third trimester?

<p>NSAIDs are contraindicated during the third trimester, thus corticosteroid use is preferred for musculoskeletal inflammation, but risks such as preeclampsia and preterm birth should be considered. (B)</p> Signup and view all the answers

Which of the following accurately describes the role of the hypothalamic-pituitary-adrenal (HPA) axis in the context of corticosteroid therapy?

<p>Exogenous corticosteroids suppress the HPA axis, which can result in adrenal insufficiency upon abrupt withdrawal of the medication. (B)</p> Signup and view all the answers

How do corticosteroids influence the migration of polymorphonuclear leukocytes and capillary permeability to reduce inflammation?

<p>Corticosteroids suppress the migration of leukocytes and reverse increased capillary permeability to reduce inflammation. (C)</p> Signup and view all the answers

How does genetic variation influence the effectiveness of NSAIDs in different individuals?

<p>Genomic variation may affect a person’s success rate with a particular NSAID due to variations in drug metabolism. (B)</p> Signup and view all the answers

Which key factor differentiates the pharmacokinetics of aspirin from other common NSAIDs?

<p>Aspirin begins to acetylate platelets within minutes of reaching the presystemic circulation, affecting its anti-thrombotic effects. (B)</p> Signup and view all the answers

What distinguishes ketorolac from other Nonsteroidal Anti-inflammatory Drugs in terms of its route of administration and analgesic properties?

<p>Ketorolac is the only NSAID routinely administered via the parenteral route, offering analgesia comparable to opioids in certain situations. (C)</p> Signup and view all the answers

In which way do NSAIDs affect pain pathways in the spinal cord dorsal horn?

<p>NSAIDs that cross the blood-brain barrier prevent the generation of prostaglandins that act as pain-producing neuromodulators in the spinal cord dorsal horn. (B)</p> Signup and view all the answers

In the context of inflammation, what is the primary purpose of inflammatory mediators?

<p>To eliminate the cause of cell injury and clear debris, preparing for tissue repair. (D)</p> Signup and view all the answers

What is the primary mechanism by which increased vascular permeability contributes to the signs and symptoms of acute inflammation?

<p>Extravasation of plasma, leading to swelling and pain. (B)</p> Signup and view all the answers

What is a key factor influencing the effectiveness of topical NSAIDs, such as diclofenac gel, in treating musculoskeletal pain?

<p>The decreased systemic exposure with topical NSAIDs, causing fewer serious side effects. (C)</p> Signup and view all the answers

What is the primary mechanism by which corticosteroids can exacerbate or prolong viral infections, such as chickenpox or measles?

<p>Corticosteroids suppress the immune system, which normally controls viral infections, leading to a prolonged or more severe course. (A)</p> Signup and view all the answers

How do vasoactive mediators (cytokines) contribute to the vascular phase of acute inflammation?

<p>By causing arterioles to dilate and endothelial cells to shrink, increasing permeability. (B)</p> Signup and view all the answers

What is the rationale for tapering corticosteroid medication instead of abrupt cessation?

<p>To allow the adrenal cortex to resume functioning capacity again. (A)</p> Signup and view all the answers

Which process is directly facilitated by chemotactic mediators during the cellular phase of acute inflammation?

<p>Targeting leukocytes to adhere to the endothelium, squeeze through capillary openings, and migrate into tissues. (D)</p> Signup and view all the answers

Why is it important to consider the sodium-retaining potential of different corticosteroids when prescribing them?

<p>To minimize the risk of fluid retention and associated cardiovascular complications. (C)</p> Signup and view all the answers

What characterizes the transition from acute to chronic inflammation in terms of the immune response?

<p>The accumulation and activation of macrophages and lymphocytes. (C)</p> Signup and view all the answers

Which statement accurately explains how NSAIDs interact with the arachidonic acid cascade?

<p>NSAIDs target cyclooxygenase (COX), the rate-limiting enzyme in the production of prostaglandins from arachidonic acid. (B)</p> Signup and view all the answers

How does fibrosis, resulting from chronic inflammation, potentially impair normal tissue function?

<p>Fibrosis leads to excessive deposition of fibrous tissue, interfering with normal tissue structure and function. (B)</p> Signup and view all the answers

What is the primary mechanism by which corticosteroids exert their anti-inflammatory effects?

<p>By preventing the liberation of arachidonic acid from plasma-membrane phospholipids. (A)</p> Signup and view all the answers

What is the PRIMARY advantage of using topical NSAIDs over oral NSAIDs for treating localized musculoskeletal pain?

<p>Topical NSAIDs have decreased systemic exposure and potentially fewer gastrointestinal side effects compared to oral NSAIDs. (C)</p> Signup and view all the answers

How does the route of corticosteroid administration affect the likelihood of systemic side effects?

<p>Local administration, such as joint injections, minimizes systemic side effects compared to oral administration. (D)</p> Signup and view all the answers

Why are patients with Crohn’s disease or ulcerative colitis advised to exercise caution when using NSAIDs?

<p>NSAIDs inhibit synthesis of prostaglandins that protect the gastric mucosa, exacerbating the intestinal damage of the underlying disease. (C)</p> Signup and view all the answers

What is the potential consequence of prolonged suppression of the hypothalamic-pituitary-adrenal (HPA) axis due to long-term corticosteroid use?

<p>Adrenal gland atrophy and potential for acute adrenal crisis upon abrupt withdrawal. (A)</p> Signup and view all the answers

What is the clinical significance of NSAIDs' ability to penetrate synovial joints, particularly in the context of treating arthritis?

<p>This allows the drugs to reduce inflammation and pain locally within the joint, providing targeted relief. (C)</p> Signup and view all the answers

What is the connection between high doses of exogenous cortisol and Cushing's Syndrome?

<p>High levels of exogenous corticosteroids for a prolonged time cause symptoms that mimic drug-induced Cushing's syndrome. (D)</p> Signup and view all the answers

Why is the gradual tapering of corticosteroid dosage recommended after prolonged use?

<p>To minimize withdrawal symptoms and allow the adrenal cortex to resume normal function. (D)</p> Signup and view all the answers

What is the primary mechanism by which long-term use of corticosteroids can lead to increased risk of gastric ulcers or gastritis?

<p>Corticosteroids increase acid production and reduce the production of protective mucus. (B)</p> Signup and view all the answers

What is a significant risk associated with high-dose, long-term corticosteroid use regarding bone health?

<p>Avascular necrosis, particularly of the head of the femur and humerus. (A)</p> Signup and view all the answers

Why are corticosteroids sometimes prescribed in extra doses during times of acute stress, such as severe infection or surgery?

<p>To mimic the body's natural cortisol surge and support healing. (C)</p> Signup and view all the answers

What is the best course of action due to major vascular events from diclofenac?

<p>Due to diclofenac's high risk of triggering vascular events, it may only be used topically. (A)</p> Signup and view all the answers

In regards to inflammation, what does the vascular phase involve?

<p>Vasodilation and shrinkage of endothelial cells. (D)</p> Signup and view all the answers

What is the primary mechanism by which nonsteroidal anti-inflammatory drugs (NSAIDs) exert their effects?

<p>By inhibiting cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis. (B)</p> Signup and view all the answers

Of the following scenarios, when are corticosteroid prescriptions typically used?

<p>Immunosuppression. (C)</p> Signup and view all the answers

What distinguishes selective cyclooxygenase-2 (COX-2) inhibitor NSAIDs from nonselective NSAIDs?

<p>COX-2 inhibitors selectively target COX-2 enzymes, decreasing GI toxicity but potentially increasing cardiovascular risks. (C)</p> Signup and view all the answers

Which action should be done with caution when considering giving NSAIDS to patients?

<p>Give NSAIDS to patients with hepatic diseases. (D)</p> Signup and view all the answers

Why are NSAIDs generally avoided or used with caution in patients with advanced hepatic or renal disease?

<p>NSAIDs can alter pharmacokinetic effects, increasing the risk of bleeding and acute kidney injury. (A)</p> Signup and view all the answers

How do NSAIDs affect pain pathways?

<p>By reducing prostaglandin synthesis, decreasing inflammatory hyperalgesia and allodynia. (D)</p> Signup and view all the answers

In what primary way does aspirin differ from other NSAIDs in its mechanism of action?

<p>Aspirin irreversibly inhibits COX enzymes, resulting in antithrombotic effects. (B)</p> Signup and view all the answers

What is the relationship between NSAID dosage and therapeutic effects?

<p>NSAIDs have a dose-dependent relationship between concentration and therapeutic effects, but also pose dose-related risks. (D)</p> Signup and view all the answers

What is the primary advantage of using topical NSAIDs compared to oral NSAIDs?

<p>Topical NSAIDs have decreased systemic exposure and fewer gastrointestinal side effects. (C)</p> Signup and view all the answers

Which factor contributes to the variability in metabolism and elimination of NSAIDs among individuals?

<p>Genetic variation in metabolizing enzymes and variation in the intestinal microbiome. (D)</p> Signup and view all the answers

What is the typical duration of action for generic oral formulations of prednisone, methylprednisolone, and triamcinolone?

<p>12 to 36 hours (B)</p> Signup and view all the answers

What is a common symptom of Cushing's syndrome (hypercortisolism) caused by long-term exposure to an excess of cortisol?

<p>A fatty (buffalo) hump between the shoulders and a round face (A)</p> Signup and view all the answers

What route of administration ensures NSAIDs, known for their systemic distribution, effectively reach the synovial joints?

<p>Oral administration (A)</p> Signup and view all the answers

The acute phase of inflammation is marked by distinct processes. What is the correct sequence of events?

<p>Vascular phase, cellular phase, tissue healing (B)</p> Signup and view all the answers

The hypothalamic-pituitary-adrenal (HPA) axis can be suppressed in patients who are receiving corticosteroids for prolonged periods, and ACTH stimulates the release of cortisol from the adrenal cortex. What critical action becomes necessary when therapy is stopped abruptly?

<p>Taper dosage of the administered corticosteroid (D)</p> Signup and view all the answers

What effect do endogenous corticosteroids have?

<p>They suppress manifestations of allergic disease due to the release of histamine from mast cells and basophils (A)</p> Signup and view all the answers

How are NSAIDs effective against inflammatory pain?

<p>They are effective against inflammatory pain of low to moderate intensity (C)</p> Signup and view all the answers

What is the role of fibroblasts during periods of chronic inflammation?

<p>They replace the original injured tissue (B)</p> Signup and view all the answers

What is released in order to bring about vascular changes that cause pain and swelling?

<p>All of these options (C)</p> Signup and view all the answers

What affect does food intake have on absorption and systemic availability?

<p>It variably quickens absorption delays absorption (A)</p> Signup and view all the answers

In certain cases, NSAIDs have proven an effective treatment option for what pain condition?

<p>Migraine attacks (A)</p> Signup and view all the answers

What is required for the anti-inflammatory effects of corticosteroids?

<p>High levels of circulating Corticosteroids (C)</p> Signup and view all the answers

What kind of medications are NSAIDs?

<p>Antipyretic, Anti-Inflammatory and Analgesic (D)</p> Signup and view all the answers

Findings from the Coxib and traditional NSAID Trialists’ Collaboration suggest an increased risk for what condition?

<p>Increased risk in the incidence of myocardial infarction, stroke, and vascular death (B)</p> Signup and view all the answers

How do corticosteroids affect lactation?

<p>Corticosteroid use following birth can disturb normal lactation (D)</p> Signup and view all the answers

What process, involving tissue adherence and permeation, is directly associated with chemotaxis?

<p>Leukocytes targeting (B)</p> Signup and view all the answers

What can be said of the relationship between inflammation and infection?

<p>Although similar in its physiological responses, inflammation is not a synonym for infection (B)</p> Signup and view all the answers

How do vasoactive mediators contribute to swelling during the acute phase of inflammation?

<p>By increasing the permeability of capillaries and venules, facilitating plasma extravasation into the tissues. (B)</p> Signup and view all the answers

What is the primary role of chemokines in the cellular phase of acute inflammation?

<p>To attract macrophages to the site of inflammation. (D)</p> Signup and view all the answers

How do fibroblasts contribute to the pathology seen in chronic inflammation?

<p>By producing excessive amounts of fibrous tissue, leading to fibrosis and impaired tissue function. (B)</p> Signup and view all the answers

What is a key difference in the mechanism of action between NSAIDs and corticosteroids in reducing inflammation?

<p>NSAIDs inhibit cyclooxygenase (COX) enzymes, whereas corticosteroids prevent the release of arachidonic acid. (D)</p> Signup and view all the answers

In what way do corticosteroids primarily influence the inflammatory process?

<p>By profoundly altering the immune responses of lymphocytes and reducing the synthesis or release of inflammatory mediators. (A)</p> Signup and view all the answers

Why is tapering the dose of corticosteroids recommended when discontinuing long-term therapy?

<p>To allow the adrenal cortex to resume its normal cortisol production, preventing acute adrenal insufficiency. (B)</p> Signup and view all the answers

What is a potential risk of high-dose, long-term corticosteroid use on bone health?

<p>Avascular necrosis, particularly of the head of the femur and humerus, potentially leading to bone collapse and severe arthritis. (C)</p> Signup and view all the answers

Why should NSAIDs be used with caution in patients with cardiovascular disease?

<p>They can increase the risk of heart attacks, stroke, and vascular death. (A)</p> Signup and view all the answers

How do NSAIDs exert their analgesic effects at the peripheral level?

<p>By reducing prostaglandin synthesis, which decreases inflammatory hyperalgesia and allodynia. (B)</p> Signup and view all the answers

What is the primary mechanism by which NSAIDs can cause gastric ulcers or gastrointestinal bleeding?

<p>By inhibiting COX-1, which reduces the production of prostaglandins that protect the stomach lining. (D)</p> Signup and view all the answers

How does food intake typically affect the absorption of orally administered NSAIDs?

<p>Food intake may delay absorption and systemic availability of NSAIDs. (C)</p> Signup and view all the answers

What primarily differentiates selective COX-2 inhibitor NSAIDs from nonselective NSAIDs?

<p>Selective COX-2 inhibitors produce equivalent analgesia to nonselective NSAIDs while decreasing gastrointestinal toxicity. (B)</p> Signup and view all the answers

Why are NSAIDs generally ineffective in treating neuropathic pain?

<p>Neuropathic pain involves nerve damage and altered pain processing, which do not primarily involve prostaglandin synthesis. (D)</p> Signup and view all the answers

In what way does aspirin differ from other NSAIDs in its mechanism of action?

<p>Aspirin irreversibly inhibits COX enzymes, whereas other NSAIDs are reversible inhibitors. (B)</p> Signup and view all the answers

How do NSAIDs affect pain pathways in the spinal cord dorsal horn?

<p>By preventing the generation of prostaglandins that act as pain-producing neuromodulators. (D)</p> Signup and view all the answers

During post-injury acute inflammation, what is the purpose of the adherence of leukocytes to the endothelium termed margination?

<p>Allows leukocytes to squeeze through small openings in blood vessels and arrive at the inflammation site. (B)</p> Signup and view all the answers

Which of the following scenarios MOST accurately describes the mechanism by which chronic inflammation can disrupt normal tissue function?

<p>Excessive deposition of fibrous tissue impairs tissue architecture and elasticity. (B)</p> Signup and view all the answers

How do corticosteroids like prednisone primarily mediate anti-inflammatory effects at the cellular level?

<p>Modulating gene transcription to decrease production of inflammatory cytokines and mediators. (C)</p> Signup and view all the answers

What is the underlying mechanism by which the abrupt cessation of long-term corticosteroid therapy can precipitate acute adrenal insufficiency?

<p>Exogenous corticosteroids suppress the HPA axis, causing adrenal atrophy and reduced cortisol production. (A)</p> Signup and view all the answers

Why is the use of NSAIDs avoided or approached with extreme caution in patients with advanced hepatic or renal disease?

<p>NSAIDs' altered pharmacokinetics in these patients can potentiate adverse pharmacodynamic effects, including increased bleeding risk and acute kidney injury. (A)</p> Signup and view all the answers

What is the PRIMARY reason for prescribing supplemental doses of corticosteroids during periods of acute stress or surgery in patients on long-term corticosteroid therapy?

<p>To prevent a hypotensive crisis resulting from impaired adrenal function. (C)</p> Signup and view all the answers

How do nonselective NSAIDs exert their analgesic and anti-inflammatory effects at the molecular level?

<p>By non-selectively inhibiting cyclooxygenase (COX) enzymes, thus reducing prostaglandin and thromboxane synthesis. (C)</p> Signup and view all the answers

What is the MOST significant cardiovascular risk associated with highly selective COX-2 inhibitor NSAIDs?

<p>Elevated risk of heart attack and stroke due to increased thrombotic events. (C)</p> Signup and view all the answers

What is the underlying mechanism by which prolonged use of high-dose corticosteroids can lead to avascular necrosis (osteonecrosis) of the femoral head?

<p>Corticosteroids increase lipid levels in the blood, potentially reducing blood flow and causing ischemia in bone. (C)</p> Signup and view all the answers

How do NSAIDs modulate pain pathways in the spinal cord dorsal horn to reduce pain perception?

<p>By preventing the generation of prostaglandins that act as pain-producing neuromodulators. (D)</p> Signup and view all the answers

What is the primary concern regarding the use of corticosteroids during pregnancy, particularly in the third trimester?

<p>Potential for premature closure of the ductus arteriosus in the fetus. (D)</p> Signup and view all the answers

During the cellular phase of acute inflammation, what specific processes are directly facilitated by chemotactic mediators?

<p>Leukocyte margination, diapedesis, and emigration into tissues. (C)</p> Signup and view all the answers

Which statement accurately explains how NSAIDs interact with the arachidonic acid cascade to exert their anti-inflammatory effects?

<p>NSAIDs inhibit cyclooxygenase (COX) enzymes, reducing the production of prostaglandins and thromboxanes. (A)</p> Signup and view all the answers

How does the route of corticosteroid administration (e.g., oral vs. intra-articular) MOST significantly affect the likelihood of systemic side effects?

<p>Local administration produces a high local concentration of the steroid, often without enough systemic absorption to cause serious side effects. (B)</p> Signup and view all the answers

What distinguishes ketorolac from other NSAIDs in terms of its route of administration and analgesic properties?

<p>Ketorolac can produce analgesia equivalent to opioids when administered intramuscularly. (D)</p> Signup and view all the answers

What underlies the rationale for tapering corticosteroid medication instead of abrupt cessation, particularly after prolonged use?

<p>Abrupt cessation can precipitate acute adrenal insufficiency due to HPA axis suppression. (D)</p> Signup and view all the answers

Why is it essential to consider the sodium-retaining potential of different corticosteroids when prescribing them?

<p>Sodium retention can exacerbate hypertension and fluid overload, especially in susceptible patients. (C)</p> Signup and view all the answers

In regards to inflammation, what does the vascular phase primarily involve?

<p>Vasodilation and increased permeability of blood vessels. (C)</p> Signup and view all the answers

What characterizes a granuloma, a hallmark of chronic inflammation?

<p>A mass of macrophages surrounded by lymphocytes. (A)</p> Signup and view all the answers

What factor influences the effectiveness of topical NSAIDs, such as diclofenac gel, in treating musculoskeletal pain?

<p>Penetration through the skin to reach underlying tissues. (C)</p> Signup and view all the answers

How do vasoactive mediators (cytokines) affect the vascular phase of acute inflammation?

<p>Causing arterioles to dilate and increasing vascular permeability. (A)</p> Signup and view all the answers

By what mechanism does increased vascular permeability primarily contribute to the signs and symptoms of acute inflammation?

<p>Enabling plasma proteins and fluid releasing edema and pain. (A)</p> Signup and view all the answers

Which statement regarding nonselective NSAIDs describes a disadvantage of their mechanism of action?

<p>They increase the risk of gastrointestinal bleeding. (A)</p> Signup and view all the answers

How does the transition from acute to chronic inflammation change the focus of the immune response?

<p>Healing tissue to persistent immune activation. (B)</p> Signup and view all the answers

What distinguishes the mechanism of action of corticosteroids from that of nonsteroidal anti-inflammatory drugs (NSAIDs) in controlling inflammation?

<p>Corticosteroids act primarily on the cellular phase by altering lymphocyte immune responses, while NSAIDs inhibit the vascular phase by targeting COX. (C)</p> Signup and view all the answers

How does the body's natural cortisol response relate to the therapeutic use of corticosteroid medications during periods of prolonged stress?

<p>Corticosteroid medications mimic the cortisol surge produced by the body during stressful events, but require tapering to prevent adrenal crisis upon cessation. (A)</p> Signup and view all the answers

In the context of musculoskeletal inflammation during pregnancy, what determines the choice between using corticosteroids and NSAIDs?

<p>Corticosteroids are preferred in late pregnancy because NSAIDs are contraindicated in the third trimester. (C)</p> Signup and view all the answers

How does genetic variation impact the therapeutic efficacy and safety profile of NSAIDs in different individuals?

<p>Genetic variation affects NSAID metabolism and elimination and may lead to interindividual variability in therapeutic response and adverse effects. (D)</p> Signup and view all the answers

What is the rationale behind combining NSAIDs with opioids in pain management, and what are the potential benefits and risks of this approach?

<p>Coadministration of NSAIDs can reduce the required opioid dose for sufficient pain control, reducing the likelihood of adverse opioid effects. (D)</p> Signup and view all the answers

Why is there significant concern regarding the use of selective COX-2 inhibitor NSAIDs despite their reduced gastrointestinal toxicity compared to nonselective NSAIDs?

<p>Selective COX-2 inhibitors have been linked to an increased risk of cardiovascular thrombotic events, such as myocardial infarction and stroke. (D)</p> Signup and view all the answers

How do NSAIDs exert their analgesic effects at the peripheral level to reduce pain sensation?

<p>NSAIDs reduce the activation threshold at the peripheral terminals of nociceptor neurons by reducing prostaglandin synthesis, decreasing inflammatory hyperalgesia and allodynia. (A)</p> Signup and view all the answers

What is the underlying mechanism by which prolonged use of high-dose corticosteroids can lead to avascular necrosis, particularly in the head of the femur and humerus?

<p>Corticosteroids increase lipid levels in the blood, which reduces blood flow to bone tissue, leading to ischemia and eventual necrosis. (C)</p> Signup and view all the answers

How does the hypothalamic-pituitary-adrenal (HPA) axis respond to long-term exogenous corticosteroid administration, and what are the clinical implications of this response?

<p>The HPA axis is suppressed, leading to decreased production of corticotropin-releasing hormone (CRH) and adrenocorticotropic hormone (ACTH), which can result in adrenal insufficiency upon abrupt cessation of corticosteroid therapy. (A)</p> Signup and view all the answers

In the context of inflammation, what is the primary purpose of chemotaxis?

<p>To attract immune cells, such as leukocytes and macrophages, to the site of tissue injury or infection. (A)</p> Signup and view all the answers

What is the primary mechanism by which topical NSAIDs reduce pain and inflammation compared to oral NSAIDs?

<p>Topical NSAIDs provide localized relief with decreased systemic exposure and fewer gastrointestinal side effects compared to oral NSAIDs. (B)</p> Signup and view all the answers

What are the PRIMARY differences among the traditional nonselective COX inhibitor NSAIDs?

<p>They vary primarily in their potency, analgesic and anti-inflammatory effectiveness, duration of action, and gastrointestinal toxicity. (D)</p> Signup and view all the answers

How would inappropriate prescription doses of exogenous corticosteroids impact the body?

<p>Prescription doses of exogenous corticosteroids cause higher than normal levels of cortisol in the blood, causing the adrenal glands to stop making cortisol. (D)</p> Signup and view all the answers

What are the therapeutic benefits of administering corticosteroids locally, such as by injection into an inflamed joint or near an irritated nerve?

<p>Local administration creates a higher concentration in the target area, often without enough systemic absorption to cause serious side effects. (A)</p> Signup and view all the answers

What are the symptoms of acute adrenal insufficiency (also Addison’s disease)?

<p>Irritability, nausea, joint pain, dizziness, and low blood pressure. (C)</p> Signup and view all the answers

How do corticosteroids' immunosuppressant effects relate to leukocyte function?

<p>Corticosteroids inhibit certain aspects of leukocyte function, which largely accounts for their immunosuppressant effect.</p> Signup and view all the answers

In the context of inflammation, how do chemokines contribute to the cellular phase?

<p>Chemokines attract macrophages to the site of inflammation.</p> Signup and view all the answers

Explain why patients on long-term corticosteroid therapy may need increased doses during acute stress.

<p>Corticosteroids mimic the cortisol surge normally produced during stressful events, supporting healing and preventing delayed or incomplete recovery.</p> Signup and view all the answers

How do nonselective NSAIDs exert antithrombotic effects, and what is the underlying mechanism?

<p>Traditional nonselective NSAIDs inhibit COX enzymes, reducing thromboxane production, which is necessary for platelet aggregation.</p> Signup and view all the answers

Describe the role of fibroblasts in chronic inflammation and its potential consequences.

<p>Fibroblasts replace damaged tissue, leading to fibrosis, which interferes with normal tissue function due to excessive deposition of fibrous tissue.</p> Signup and view all the answers

How does local administration of corticosteroids minimize systemic side effects?

<p>Local administration produces high local concentrations of the steroid without significant systemic absorption, reducing the risk of systemic side effects.</p> Signup and view all the answers

Explain why the HPA axis is a concern during prolonged corticosteroid therapy and how tapering addresses this.

<p>Prolonged corticosteroid use can suppress the HPA axis, and abrupt cessation can lead to adrenal insufficiency. Tapering allows the adrenal cortex to resume functioning gradually.</p> Signup and view all the answers

How do NSAIDs reduce inflammatory hyperalgesia and allodynia at the peripheral terminals of nociceptor neurons?

<p>NSAIDs reduce inflammatory hyperalgesia and allodynia by reducing prostaglandin synthesis thus reducing the activation threshold at the peripheral terminals of primary afferent nociceptor neurons.</p> Signup and view all the answers

Discuss why certain viral infections may have a more severe course in individuals taking corticosteroids.

<p>Corticosteroids suppress the immune system, which increases the risk of infection, and increases the severity of certain viral infections.</p> Signup and view all the answers

Describe how the anti-inflammatory effects of corticosteroids differ from those of NSAIDs concerning the phases of inflammation they primarily inhibit.

<p>NSAIDs inhibit the vascular phase of inflammation, whereas corticosteroids primarily inhibit the cellular phase.</p> Signup and view all the answers

Explain the mechanism by which corticosteroids can lead to avascular necrosis, particularly in the femoral and humeral heads.

<p>Corticosteroids may increase lipid levels in the blood, thus reducing blood flow in the bone, leading to avascular necrosis.</p> Signup and view all the answers

How does the use of topical NSAIDs compare to oral NSAIDs in terms of systemic exposure and gastrointestinal side effects?

<p>Topical NSAIDs have decreased systemic exposure compared to oral formulations, leading to fewer gastrointestinal side effects.</p> Signup and view all the answers

Discuss the role of the intestinal microbiome in the metabolism and elimination of NSAIDs.

<p>Variation in the composition of the intestinal microbiome may contribute to variability in the metabolism and elimination of NSAIDs.</p> Signup and view all the answers

Explain why NSAIDs are generally not recommended in patients with advanced hepatic or renal disease.

<p>NSAIDs can have altered pharmacokinetic effects in patients with advanced hepatic or renal disease, increasing the risk of bleeding and acute kidney injury.</p> Signup and view all the answers

How do the cardiovascular effects of selective COX-2 inhibitors compare to those of nonselective NSAIDs, and what are the implications for patient safety?

<p>COX-2 inhibitors have been associated with a higher incidence of cardiovascular thrombotic events compared to nonselective NSAIDs, raising safety concerns.</p> Signup and view all the answers

Describe the mechanism by which NSAIDs produce analgesic effects, focusing on their action on cyclooxygenase (COX) enzymes.

<p>NSAIDs produce analgesia by inhibiting COX enzymes, which are involved in the production of pain-signaling molecules.</p> Signup and view all the answers

Explain the significance of the hypothalamic-pituitary-adrenal (HPA) axis in patients undergoing long-term corticosteroid therapy.

<p>The HPA axis can be suppressed in patients receiving corticosteroids for prolonged periods, leading to potential adrenal insufficiency.</p> Signup and view all the answers

What are the primary mechanisms of action of corticosteroids in reducing inflammation and suppressing the immune system?

<p>Corticosteroids decrease inflammation by suppressing the migration of polymorphonuclear leukocytes and reversing increased capillary permeability. They also inhibit the production of critical factors for the inflammatory response and decrease the release of vasoactive and chemoattractive factors.</p> Signup and view all the answers

Explain the role and significance of tumor necrosis factor alpha (TNF-α) in the context of acute inflammation.

<p>TNF-α promotes the acute-phase response. It is secreted by activated macrophages.</p> Signup and view all the answers

Discuss potential consequences and management strategies for acute adrenal insufficiency in patients discontinuing corticosteroid therapy.

<p>Acute adrenal insufficiency can cause symptoms like irritability, nausea, joint pain, and low blood pressure. Management involves slowly tapering the medication to allow the adrenal cortex to resume its functioning.</p> Signup and view all the answers

Detail potential considerations regarding the use of corticosteroids during pregnancy. Address both benefits and risks.

<p>Corticosteroids are preferred in pregnancy when NSAIDs are contraindicated. Risks include preeclampsia, low birth weight, preterm birth, and potential hyperglycemia and ketoacidosis for the patient with gestational diabetes.</p> Signup and view all the answers

Detail potential considerations regarding the use of NSAIDs for a patient with diabetes or at elevated risk for thrombotic factors.

<p>Safety concerns exist for NSAID use in patients, or at elevated risk, for thrombotic events or diabetes.</p> Signup and view all the answers

In cases of adrenal insufficiency and HPA axis suppression, why should withdrawal of a corticosteroid be conducted slowly and carefully?

<p>Overuse of steroid joint injections may also result in adrenal suppression after their discontinuation. Withdrawal and discontinuation of a corticosteroid should be conducted slowly and carefully.</p> Signup and view all the answers

What is the role of equipotent dosing when interchanging corticosteroid preparations, and why is it significant?

<p>When dosed equivalently, the various corticosteroids are equivalent in anti-inflammatory efficacy and have similar side-effect profiles, except for fluid retention.</p> Signup and view all the answers

Compare and contrast the duration of action between standard formulations of prednisone, methylprednisolone, and triamcinolone versus dexamethasone and betamethasone.

<p>Standard formulations of prednisone, methylprednisolone, and triamcinolone last for around 12 to 36 hours in the body, whereas dexamethasone and betamethasone last for 32 to 72 hours.</p> Signup and view all the answers

Discuss the implications of plasma protein binding for NSAID distribution and potential drug interactions.

<p>NSAIDs are extensively bound to plasma proteins, and NSAID binding in plasma can be saturated when the concentration of the NSAID exceeds that of albumin.</p> Signup and view all the answers

Explain the dose dependent relationship between NSAID concentration and therapeutic effects, and the associated risks such as gastropathy and renal impairment.

<p>NSAIDs have a dose-dependent relationship between concentration and therapeutic effects, but all NSAIDs pose dose- and age-related risks of gastropathy and renal impairment.</p> Signup and view all the answers

What specific advice would you provide an athelte on corticosteroid that suffered a severe ankle sprain? Consider dosing adjustments, precautions, and potential adverse effects.

<p>Follow the prescriber's instructions precisely, manage infection risk, and understand tapering.</p> Signup and view all the answers

How do NSAIDs work to affect pain pathways?

<p>NSAIDs affect pain pathways in at least 3 ways: decreasing inflammatory hyperalgesia and allodynia, decreasing the recruitment of leukocytes and production of inflammatory mediators, and prevent the generation of pain-producing neuromodulators.</p> Signup and view all the answers

How can you assess a patient to see ensure no anaphylactoid reactions or other rare adverse effects during corticosteroid administration?

<p>Educate the patient on the signs and symptoms of an allergic reaction, and monitor them after administration.</p> Signup and view all the answers

What is the role of soluble factors, such as platelet-derived growth factor, fibrogenic cytokines, and angiogenic factors, in chronic inflammation and tissue remodeling?

<p>Soluble factors released by macrophages and lymphocytes play an important role in the development of chronic inflammation. Replacement of damaged tissue by fibroblasts leads to fibrosis.</p> Signup and view all the answers

How do corticosteroids inhibit the inflammatory response to tissue injury, and what are the implications of this action for managing inflammation?

<p>Corticosteroids inhibit the inflammatory response to tissue injury and also suppress manifestations of allergic disease due to the release of histamine from mast cells and basophils.</p> Signup and view all the answers

What distinguishes chronic inflammation from acute inflammation in terms of its causes, cellular composition, and potential outcomes?

<p>Chronic inflammation results from continuous or repeated exposure to the offending element or process and is characterized by the accumulation and activation of macrophages and lymphocytes, as well as fibroblasts, which replace the original, damaged, or necrotic tissue.</p> Signup and view all the answers

Explain the mechanisms that contribute to acute adrenal insufficiency.

<p>High levels of exogenous corticosteroids for a prolonged time cause the hypothalamus to secrete less corticotropin-releasing hormone, which reduces ACTH and cortisol production.</p> Signup and view all the answers

Should athletes with musculoskeletal inflammation late in pregnancy use NSAIDs? Explain why or why not.

<p>Corticosteroid use is preferred for pregnant women with musculoskeletal inflammation late in pregnancy because NSAIDs are contraindicated during the third trimester.</p> Signup and view all the answers

Why can NSAIDs be a necessary choice in pain management?

<p>NSAIDs are a necessary choice in pain management because of the integrated role of the COX pathway in the generation of inflammation and the biochemical recognition of pain.</p> Signup and view all the answers

What happens molecularly as a result of corticosteroid administration? Explain the importance of food with administration.

<p>Corticosteroids are strikingly similar in their molecular structures and clinical effects and should be administered with food.</p> Signup and view all the answers

Anaphylactoid reactions are a common side effect in patients receiving corticosteroids. True/False

<p>False</p> Signup and view all the answers

What is the primary mechanism of action of NSAIDs, and how does it contribute to their analgesic, antipyretic, and anti-inflammatory effects?

<p>The classic COX inhibitors are not selective and inhibit all types of COX enzyme activity, thus impairing the ultimate transformation of arachidonic acid to prostaglandins, prostacyclin, and thromboxanes.</p> Signup and view all the answers

What are key differences between the topical route of administration for NSAIDs compared to the oral route of administration?

<p>Topical NSAIDs have decreased systemic exposure compared to the oral and intravenous formulations; therefore, they are expected to cause less serious side effects.</p> Signup and view all the answers

Discuss the pharmacokinetics of NSAIDs, with particular emphasis on their absorption, distribution, metabolism, and excretion.

<p>After oral administration, the absorption of NSAIDs is generally rapid, and peak plasma concentrations are reached within 3 hours. Oral NSAIDs undergo hepatic first-pass metabolism, resulting in reduced bioavailability. Food intake may delay absorption and systemic availability.</p> Signup and view all the answers

How does chronic inflammation potentially lead to fibrosis, and what is the primary mechanism behind this process?

<p>Chronic inflammation can lead to fibrosis through the excessive accumulation and activation of fibroblasts, which replace damaged tissue with fibrous tissue. This process is driven by soluble factors released by macrophages and lymphocytes, including growth factors, fibrogenic cytokines (IL-1 and TNF-α), and angiogenic factors, ultimately resulting in the overproduction of fibrous tissue.</p> Signup and view all the answers

How do corticosteroids affect the hypothalamic-pituitary-adrenal (HPA) axis, and what are the potential consequences of this effect when discontinuing corticosteroid therapy?

<p>Corticosteroids can suppress the HPA axis by inhibiting the release of corticotropin-releasing hormone (CRH) from the hypothalamus and adrenocorticotropic hormone (ACTH) from the pituitary gland. This suppression reduces the adrenal glands' production of cortisol. Abrupt discontinuation of corticosteroid therapy can lead to acute adrenal insufficiency (Addison’s disease) due to the adrenal cortex not immediately resuming cortisol production.</p> Signup and view all the answers

Explain the mechanism by which NSAIDs exert their analgesic effects, with specific attention to the cyclooxygenase (COX) enzymes.

<p>NSAIDs exert their analgesic effects by inhibiting cyclooxygenase (COX) enzymes (COX-1 and COX-2), which are critical for the production of prostaglandins. By reducing prostaglandin synthesis, NSAIDs decrease inflammatory hyperalgesia and allodynia, thereby reducing pain.</p> Signup and view all the answers

Compare and contrast the mechanisms of action of corticosteroids and NSAIDs in controlling inflammation.

<p>Corticosteroids prevent the liberation of arachidonic acid from plasma-membrane phospholipids, reducing the synthesis of eicosanoids (e.g., prostaglandins, thromboxanes, and leukotrienes). NSAIDs inhibit cyclooxygenase (COX), the rate-limiting enzyme in the production of prostaglandins. Thus, corticosteroids act earlier in the inflammatory cascade than NSAIDs.</p> Signup and view all the answers

What are the primary proinflammatory cytokines secreted by activated macrophages during the tissue healing (granular) phase of acute inflammation, and how do these cytokines contribute to the inflammatory response?

<p>The primary proinflammatory cytokines secreted by activated macrophages include interleukin-1 (IL-1), interleukin-6 (IL-6), and tumor necrosis factor alpha (TNF-α). These cytokines induce coagulation, increase vascular permeability, and promote the acute-phase response, contributing to the overall inflammatory reaction.</p> Signup and view all the answers

Describe the significance of localized corticosteroid administration versus systemic administration in terms of side effects and therapeutic efficacy.

<p>Localized administration, like injection into a joint, provides a high local steroid concentration with minimal systemic absorption, reducing the risk of systemic side effects. Systemic administration affects the entire body, increasing the risk of widespread side effects but is necessary for treating systemic conditions.</p> Signup and view all the answers

Explain why NSAIDs are generally avoided in patients with advanced hepatic or renal disease. What specific pharmacokinetic alterations contribute to this precaution?

<p>NSAIDs are avoided in patients with advanced hepatic or renal disease due to the drugs’ potential altered pharmacokinetic effects, which can potentiate increased adverse pharmacodynamic effects, including risk of bleeding and acute kidney injury. NSAID elimination is dependent on the free (unbound) fraction of the drug within the plasma and the intrinsic enzyme activities of the liver to metabolize the drug to an excretable metabolite.</p> Signup and view all the answers

How do NSAIDs affect pain pathways, and what are the distinct mechanisms involved in their analgesic action?

<p>NSAIDs affect pain pathways in at least three ways: (1) By reducing prostaglandin synthesis, NSAIDs decrease inflammatory hyperalgesia and allodynia. (2) NSAIDs decrease the recruitment of leukocytes and, thereby, the production of leukocyte-derived inflammatory mediators. (3) NSAIDs that cross the blood-brain barrier prevent the generation of prostaglandins that act as pain-producing neuromodulators in the spinal cord dorsal horn.</p> Signup and view all the answers

What is the role of histamine, bradykinin, and prostaglandins in the vascular changes associated with the acute inflammatory response?

<p>Histamine, bradykinin, and prostaglandins are local chemical mediators that cause vasodilation and increase blood vessel wall permeability during the acute inflammatory response. Vasodilation leads to increased blood flow, resulting in redness and heat, while increased permeability allows plasma exudation, causing swelling and pain.</p> Signup and view all the answers

Describe the differences between selective and nonselective NSAIDs, including their effects on COX enzymes and the associated risks.

<p>Nonselective NSAIDs inhibit both COX-1 and COX-2 enzymes, leading to reduced inflammation and pain relief but also increasing the risk of gastrointestinal side effects due to COX-1 inhibition. Selective COX-2 inhibitors primarily target COX-2, reducing inflammation and pain with decreased gastrointestinal risks but potentially increasing cardiovascular thrombotic events.</p> Signup and view all the answers

Explain how the acute inflammatory response differs when it occurs due to tissue injury versus when it is triggered by invading pathogens.

<p>Whether the acute inflammatory response occurs due to tissue injury or invading pathogens, the response is similar. Mediators are released leading to the vascular and cellular phases, along with the ultimate tissue healing phase. The extent and duration of phases is tailored to the degree and source of tissue damage/infection.</p> Signup and view all the answers

What are the potential consequences of long-term use of exogenous corticosteroid therapy?

<p>Long-term use of exogenous corticosteroid therapy can cause abnormally high cortisol levels, leading to Cushing’s syndrome (hypercortisolism). Typical undesired effects of corticosteroids present quite uniformly as drug-induced Cushing’s syndrome, caused by long-term exposure to an excess of cortisol. Symptoms include a fatty (buffalo) hump between the shoulders, a round face, weight gain, irregular menstrual cycles, fatigue, and depression.</p> Signup and view all the answers

What is the role of genomic variation in determining a person’s success rate with a particular NSAID?

<p>Genomic variation may affect a person’s success rate with a particular NSAID; thus, there are &gt;20 treatment options. Due to genomic variation, individuals may respond differently to NSAIDs, implying that personalized medicine approaches, tailored to an individual's genes, could improve therapeutic outcomes and minimize adverse effects.</p> Signup and view all the answers

Discuss the impact of food intake and antacids on the absorption and systemic availability of orally administered NSAIDs.

<p>Food intake may delay the absorption and systemic availability of orally administered NSAIDs. Antacids, commonly prescribed to patients on NSAID therapy, variably delay absorption. Administering NSAIDs on an empty stomach typically results in faster absorption, whereas taking them with food can slow the process.</p> Signup and view all the answers

How and why is corticosteroid use preferred over NSAIDs for pregnant women with musculoskeletal inflammation late in pregnancy?

<p>Corticosteroid use is preferred for pregnant women with musculoskeletal inflammation late in pregnancy because NSAIDs are contraindicated during the third trimester. This preference is due to the potential adverse effects of NSAIDs on the fetus, such as premature ductus arteriosus closure and oligohydramnios.</p> Signup and view all the answers

What is acute adrenal insufficiency (Addison’s disease), and what are its symptoms?

<p>Acute adrenal insufficiency is a condition characterized by inadequate production of cortisol by the adrenal glands. Symptoms include irritability, nausea, joint pain, dizziness, and low blood pressure.</p> Signup and view all the answers

Which specific NSAID has a neutral-positive cardiac profile, and why is this significant in the context of NSAID-associated cardiovascular risks?

<p>Naproxen is the only NSAID with a neutral-positive cardiac profile. This is significant because many other NSAIDs, particularly selective COX-2 inhibitors and some nonselective COX inhibitors, have been associated with an increased risk of heart attacks and other cardiovascular events.</p> Signup and view all the answers

What is osteonecrosis, and describe the relationship between corticosteroid use and the development of osteonecrosis?

<p>Osteonecrosis is bone death due to lack of blood flow. Avascular necrosis worsens with time, and eventually the bone can collapse. High-dose use of corticosteroids is the independent factor most frequently associated with the development of osteonecrosis, particularly of the femoral head.</p> Signup and view all the answers

How do corticosteroids bring about the suppression of migration of polymorphonuclear leukocytes and reversal of increased capillary permeability?

<p>Corticosteroids bring about the suppression of migration of polymorphonuclear leukocytes and reversal of increased capillary permeability through several key mechanisms. They inhibit the production of factors critical for the inflammatory response, decrease the release of vasoactive and chemoattractive factors, diminish the secretion of lipolytic and proteolytic enzymes, decrease extravasation of leukocytes to areas of injury, and decrease fibroblast activity at the site of injury.</p> Signup and view all the answers

Compare and contrast the differences between administering NSAIDs via the oral, intravenous, and topical routes.

<p>The primary route of NSAID administration is oral for both prescription and over-the-counter (OTC) medicines. Ketorolac (Toradol) is the only NSAID routinely administered via the parenteral route. Topical NSAIDs have decreased systemic exposure (i.e., lower absorption into the systemic circulation) compared to the oral and intravenous formulations; therefore, they are expected to cause less serious side effects.</p> Signup and view all the answers

Based on the information provided, what are some precautions that should be taken when prescribing corticosteroid medication to patients?

<p>Prolonged use of corticosteroids may result in immunosuppression that increases the incidence of secondary infection, mask acute infection (including fungal infections), prolong or exacerbate viral infections, or limit response to certain vaccines. Because corticosteroids suppress the immune system, they increase the risk of infection. Certain viral infections, such as chicken pox or measles, may have a more severe course in people taking corticosteroids.</p> Signup and view all the answers

Describe the three major phases of acute inflammation.

<p>The three major phases of acute inflammation are the vascular phase, the cellular phase, and the tissue healing (granular) phase. In the vascular phase, vasoactive mediators lead to vasodilation and increased vascular permeability. In the cellular phase, leukocytes migrate to the site of inflammation. During the tissue healing phase, macrophages secrete pro-inflammatory cytokines to induce coagulation and promote the acute-phase response.</p> Signup and view all the answers

What is the role of cyclooxygenase enzymes (COX-1 and COX-2) in the body, and how do NSAIDs interact with these enzymes to produce their therapeutic effects?

<p>COX-1 plays a role in protecting the stomach lining, and COX-2 is involved in inflammation and pain. Non-selective NSAIDs inhibit both COX-1 and COX-2 enzymes, leading to reduced inflammation and pain relief but also increasing the risk of gastrointestinal side effects due to COX-1 inhibition.</p> Signup and view all the answers

What is HPA axis suppression?

<p>HPA axis suppression is suppression of the hypothalamic-pituitary-adrenal axis in patients receiving high doses of corticosteroids for prolonged periods of time. With prolonged suppression, the adrenal glands atrophy and can take months to recover full function after discontinuation of the exogenous corticosteroid.</p> Signup and view all the answers

What are the key differences between acute and chronic inflammation, with specific reference to the types of immune cells involved and the potential long-term consequences?

<p>Acute inflammation is characterized by a rapid onset, short duration, and neutrophil infiltration, typically resolving quickly with minimal tissue damage. Chronic inflammation, in contrast, involves prolonged duration, macrophage and lymphocyte accumulation, and can lead to significant tissue damage, fibrosis, and granuloma formation, often resulting from persistent stimuli or immune dysfunction.</p> Signup and view all the answers

Explain the significance of first-pass metabolism in the context of oral corticosteroid administration, and how does it impact the bioavailability of the drug?

<p>First-pass metabolism refers to the metabolism of a drug by the liver before it reaches systemic circulation. Oral corticosteroids undergo first-pass metabolism during absorption, which reduces their bioavailability (the fraction of the administered dose that reaches systemic circulation).</p> Signup and view all the answers

Which laboratory values are recommended to be monitored in patients on long-term NSAID therapy and why?

<p>Renal function (serum creatinine, BUN) and a complete blood count (CBC) could be monitored in patients on long-term NSAID therapy. NSAIDs can reduce renal blood flow and impair kidney function, so monitoring renal function is important to detect early signs of kidney damage. The CBC is recommended to look for evidence of anemia, due to the potential of NSAIDs to cause GI bleeding.</p> Signup and view all the answers

How do corticosteroids affect the production and release of inflammatory mediators, and what are the specific factors involved in this process?

<p>Corticosteroids reduce the synthesis or release of a variety of inflammatory mediators, including prostaglandins, which are also inhibited by NSAIDs. This reduction occurs through mechanisms such as the inhibition of cyclooxygenase (COX) enzymes, the suppression of pro-inflammatory cytokines (e.g., IL-1, TNF-α), and the stabilization of mast cells.</p> Signup and view all the answers

Define the term 'avascular necrosis' in the context of corticosteroid therapy, and explain why the head of the femur and humerus are particularly susceptible to this condition.

<p>Avascular necrosis, also known as osteonecrosis, refers to the death of bone tissue due to a lack of blood supply. The head of the femur and humerus are particularly susceptible to this condition because they have limited blood supply, and corticosteroids can further reduce blood flow by increasing lipid levels in the blood.</p> Signup and view all the answers

Explain why NSAIDs are often co-administered with antiemetics in the treatment of migraine attacks.

<p>NSAIDs are often co-administered with antiemetics in the treatment of migraine attacks due to the frequent association of nausea with migraines. Antiemetics help relieve the nausea and vomiting, improving patient comfort and adherence to the treatment regimen.</p> Signup and view all the answers

What is the mechanism by which corticosteroids can lead to fluid retention, and which specific aspect of their structure or function contributes to this effect?

<p>Corticosteroids promote fluid retention primarily through their mineralocorticoid effects, which increase sodium reabsorption in the kidneys. This effect is related to their structure, which mimics the action of endogenous mineralocorticoids like aldosterone, leading to increased sodium and water retention and subsequent fluid retention.</p> Signup and view all the answers

Elaborate on the role of chemokines in the cellular phase of acute inflammation, detailing their mechanism of action and significance in directing leukocyte migration.

<p>Chemokines are chemotactic cytokines that guide leukocytes to the inflammation site by creating a concentration gradient. Leukocytes follow this gradient, adhering to the endothelium, squeezing through capillaries (diapedesis), and migrating into tissues.</p> Signup and view all the answers

Describe the mechanisms by which chronic inflammation can lead to fibrosis and granuloma formation, highlighting the specific cytokines and growth factors involved.

<p>In chronic inflammation, persistent macrophage and lymphocyte activation leads to fibroblast proliferation and excessive deposition of fibrous tissue (fibrosis). Cytokines like IL-1 and TNF-α, alongside growth factors like platelet-derived growth factor, stimulate this process. Granulomas, masses of activated macrophages surrounded by lymphocytes, form in response to indigestible substances.</p> Signup and view all the answers

Compare and contrast the mechanisms of action of corticosteroids and NSAIDs in controlling inflammation, emphasizing their specific targets within the arachidonic acid cascade.

<p>Corticosteroids prevent arachidonic acid liberation from plasma membrane phospholipids, decreasing eicosanoid synthesis. NSAIDs inhibit cyclooxygenase (COX), blocking prostaglandin production. Thus, corticosteroids act earlier in the cascade than NSAIDs.</p> Signup and view all the answers

Explain why tapering of corticosteroid dosage is necessary after prolonged use, detailing the underlying physiological mechanisms involved in adrenal insufficiency.

<p>Prolonged corticosteroid use inhibits the hypothalamic-pituitary-adrenal (HPA) axis, reducing ACTH and cortisol production. Abrupt cessation can cause acute adrenal insufficiency as the adrenal cortex struggles to resume cortisol synthesis, requiring tapering to gradually restore function.</p> Signup and view all the answers

Discuss the potential long-term consequences of corticosteroid use on bone health, including the mechanisms contributing to avascular necrosis and osteoporosis.

<p>Long-term corticosteroid use can elevate blood lipid levels, potentially reducing blood flow and causing avascular necrosis, especially in the femoral and humeral heads. Additionally, corticosteroids can decrease bone formation leading to osteoporosis.</p> Signup and view all the answers

In what specific scenarios would corticosteroid use be preferred over NSAIDs during pregnancy when managing musculoskeletal inflammation, and why?

<p>Corticosteroids are preferred over NSAIDs in the third trimester of pregnancy due to the contraindication of NSAIDs during this period. Additionally, corticosteroids may be used to treat maternal autoimmune disorders that pose a greater risk to fetal health than the medication itself.</p> Signup and view all the answers

Describe the molecular mechanisms by which NSAIDs exert their analgesic and anti-inflammatory effects, with specific attention to the roles of COX-1 and COX-2 isozymes.

<p>NSAIDs inhibit cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis. Nonselective NSAIDs inhibit both COX-1 and COX-2, while selective COX-2 inhibitors primarily target COX-2. COX-1 inhibition can lead to gastrointestinal side effects, while COX-2 inhibition reduces inflammation and pain.</p> Signup and view all the answers

Explain how NSAIDs affect pain pathways beyond reducing prostaglandin synthesis, including their impact on leukocyte recruitment and pain-producing neuromodulators in the spinal cord.

<p>NSAIDs decrease leukocyte recruitment, reducing the production of inflammatory mediators. They can also cross the blood-brain barrier to prevent the generation of prostaglandins that act as pain-producing neuromodulators in the spinal cord dorsal horn.</p> Signup and view all the answers

Discuss the factors that contribute to the variability in metabolism and elimination of NSAIDs, and how these variations influence dosing guidelines and potential drug interactions.

<p>Genetic variation in metabolizing enzymes, differences in intestinal microbiome composition, and the degree of protein binding contribute to variability in NSAID metabolism and elimination. These factors influence dosing and potential drug interactions, necessitating careful consideration in patients with hepatic or renal disease.</p> Signup and view all the answers

Why do NSAIDs carry cardiovascular risks, and what are the implications for prescribing NSAIDs in patients with pre-existing cardiovascular conditions or risk factors?

<p>NSAIDs, particularly selective COX-2 inhibitors, can increase the risk of myocardial infarction, stroke, and vascular death. In patients with or at risk for cardiovascular disease, NSAIDs should be used cautiously, with consideration given to alternative therapies or the lowest effective dose for the shortest duration.</p> Signup and view all the answers

Differentiate between acute and chronic inflammation in terms of etiology, cellular components, and the resulting tissue pathology.

<p>Acute inflammation is triggered by immediate injury or infection, involving neutrophils and resulting in localized, mild tissue damage. Chronic inflammation arises from persistent stimuli, involving macrophages, lymphocytes, and fibroblasts, leading to fibrosis and granuloma formation.</p> Signup and view all the answers

Explain the clinical significance of the "first-pass effect" in the context of oral corticosteroid administration and how it impacts drug bioavailability and dosing strategies.

<p>The first-pass effect refers to the metabolism of oral corticosteroids by the liver before they reach systemic circulation, reducing their bioavailability. This necessitates higher oral doses to achieve therapeutic concentrations, and influences the choice of administration route in specific cases.</p> Signup and view all the answers

How can genomic variation influence a patient's response to NSAIDs, and what are the implications for personalized pain management strategies?

<p>Genomic variations in genes encoding drug-metabolizing enzymes and drug targets can affect NSAID efficacy and side effect profiles. This implies that personalized pain management strategies, including preemptive pharmacogenomic testing, may be necessary to optimize treatment outcomes and minimize adverse events.</p> Signup and view all the answers

Discuss the role of histamine, bradykinin, and prostaglandins as local chemical mediators in the inflammatory process, detailing their specific effects on vascular changes and pain sensitization.

<p>Histamine causes vasodilation and increased vascular permeability, leading to redness and swelling. Bradykinin increases vascular permeability and sensitizes nerve endings, contributing to pain. Prostaglandins enhance vasodilation and also sensitize sensory nerve endings, amplifying pain transmission.</p> Signup and view all the answers

Describe the effects of corticosteroids on the hypothalamic-pituitary-adrenal (HPA) axis and explain the potential consequences of abrupt cessation of corticosteroid therapy.

<p>Corticosteroids suppress the HPA axis, reducing ACTH and cortisol production. Abrupt cessation can lead to acute adrenal insufficiency (Addison's disease) with symptoms including irritability, nausea, joint pain, dizziness, and low blood pressure.</p> Signup and view all the answers

Explain the concept of functional similarity among NSAIDs despite their chemical diversity, and how this relates to their therapeutic effects and side effect profiles.

<p>Despite chemical diversity, NSAIDs possess functional similarity by inhibiting cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis, resulting in analgesic, antipyretic, and anti-inflammatory effects. Their side effect profiles vary primarily in terms of GI toxicity, bleeding risk, and cardiovascular effects.</p> Signup and view all the answers

Discuss the advantages and disadvantages of topical NSAID administration compared to oral NSAID administration, with specific reference to systemic exposure, efficacy, and potential side effects.

<p>Topical NSAIDs have lower systemic exposure compared to oral NSAIDs, reducing systemic side effects. While efficacy may be similar, topical NSAIDs can cause skin rashes. Oral NSAIDs provide systemic relief, but are associated with higher rates of GI and cardiovascular side effects.</p> Signup and view all the answers

How do NSAIDs affect the production of inflammatory mediators derived from leukocytes, and what is the clinical significance of this effect in managing inflammatory conditions?

<p>NSAIDs decrease the recruitment of leukocytes and thereby reduce the production of leukocyte-derived inflammatory mediators, such as cytokines and reactive oxygen species. This contributes to the reduction of inflammation and tissue damage in various inflammatory conditions.</p> Signup and view all the answers

Explain how the duration of action and anti-inflammatory properties of repository (depot) corticosteroids differ from those of standard oral corticosteroids, and describe specific clinical scenarios where depot formulations may be preferred.

<p>Depot corticosteroids have a longer duration of action (1-4 weeks) compared to oral corticosteroids (12-72 hours) due to their slow release from the injection site. Depot formulations may be preferred for localized inflammation, such as intra-articular injections, when sustained anti-inflammatory effects are needed with reduced systemic exposure.</p> Signup and view all the answers

Explain why ketorolac (Toradol) is the only NSAID routinely administered via the parenteral route, and describe the specific situations where this route of administration offers a significant advantage.

<p>Ketorolac is suitable for parenteral administration due to its potent analgesic effects, making it an alternative to opioids for moderate to severe pain. The parenteral route allows for rapid onset and avoids first-pass metabolism, offering a significant advantage in acute pain scenarios where quick relief is crucial.</p> Signup and view all the answers

Flashcards

Inflammation

Complex response to cell injury, eliminating cause and clearing debris for tissue repair.

Anti-inflammatory drugs

Medications that control the inflammatory process and minimize inflammatory pain.

Acute Phase Response

Physiologic response to tissue injury and infection, not a synonym for infection.

Vasodilation in Inflammation

Redness and heat due to increased blood flow (hyperemia).

Signup and view all the flashcards

Cytokines

Local chemical mediators released by damaged cells or synthesized within injured tissue.

Signup and view all the flashcards

Vascular Phase

Vasoactive mediators dilate arterioles, increasing permeability.

Signup and view all the flashcards

Cellular Phase

Leukocytes adhere to endothelium, squeeze through capillaries, and migrate to tissues.

Signup and view all the flashcards

Tissue Healing (Granular) Phase

Macrophages secrete IL-1, IL-6, and TNF-α, promoting coagulation and vascular permeability.

Signup and view all the flashcards

Chronic Inflammation

Results from continuous or repeated exposure to an offending element or process.

Signup and view all the flashcards

Fibrosis

Excessive deposition of fibrous tissue, interfering with normal tissue function.

Signup and view all the flashcards

Granulomas

Mass of cells consisting of activated macrophages surrounded by activated lymphocytes.

Signup and view all the flashcards

NSAIDs Mechanism

Inhibit the vascular phase of inflammation

Signup and view all the flashcards

Corticosteroids Mechanism

Inhibit primarily the cellular phase of inflammation.

Signup and view all the flashcards

Corticosteroid Medications

Synthetic version of cortisol, effective at reducing inflammation and suppressing the immune system.

Signup and view all the flashcards

Corticosteroids Adverse Effects

Suppression of HPA axis and potential adrenal insufficiency.

Signup and view all the flashcards

Corticosteroids Therapeutic Effects

Inhibition of inflammatory response and suppression of allergic disease manifestations.

Signup and view all the flashcards

Corticosteroids Dosing During Stress

Mimics cortisol surge during stressful events to prevent delayed or incomplete healing.

Signup and view all the flashcards

Corticosteroids Indications

Autoimmune diseases, spinal disc herniation, and chronic tendinopathy.

Signup and view all the flashcards

Acute Adrenal Insufficiency Symptoms

Irritability, nausea, joint pain, dizziness, and low blood pressure.

Signup and view all the flashcards

Corticosteroids Common Side Effects

Agitation, blurred vision, fluid retention, high blood pressure, and increased blood sugar.

Signup and view all the flashcards

NSAIDs Mechanism of Action

Inhibition of COX enzymes to relieve pain in joints, muscles, and soft tissues.

Signup and view all the flashcards

NSAIDs Therapeutic Effects

Analgesic, antipyretic, and anti-inflammatory effects; traditional NSAIDs also have antithrombotic effects.

Signup and view all the flashcards

Selective NSAIDs

Cyclooxygenase-2 (COX-2) inhibitors

Signup and view all the flashcards

NSAIDs Treat

Arthritis pain responsive, menstrual pain.

Signup and view all the flashcards

Prostaglandins

NSAIDs affect pain pathways by the reduction of activation threshold.

Signup and view all the flashcards

Topical NSAIDs

Topical NSAIDs have decreased systemic exposure with less serious side effects.

Signup and view all the flashcards

NSAIDs Absorption

Most NSAIDs are acidic compounds with a high bioavailability.

Signup and view all the flashcards

NSAIDs Metabolism and Excretion

Hepatic biotransformation and renal excretion are the principal routes.

Signup and view all the flashcards

Gastrointestinal Risk

COX-1 plays a role in protecting the stomach lining.

Signup and view all the flashcards

NSAIDs Precautions

Patients with, or at elevated risk for, cardiovascular disease, diabetes, or thrombotic events.

Signup and view all the flashcards

Inflammatory Mediators Function

Eliminate the cause of cell injury, clear away debris.

Signup and view all the flashcards

Clinical Signs of Inflammation

Redness, heat, pain, and swelling.

Signup and view all the flashcards

The Vascular phase result

Arterioles dilate and endothelial cells shrink.

Signup and view all the flashcards

Corticosteroids Examples

Prednisone or hydrocortisone.

Signup and view all the flashcards

Corticosteroids Action

Prevent the liberation of arachidonic acid.

Signup and view all the flashcards

Corticosteroids Mechanism Detail

Inhibit the production of factors critical for the inflammatory response

Signup and view all the flashcards

Corticosteroids Routes

Intravenously, orally, intra-articularly, topically, intralesionally, transcutaneously.

Signup and view all the flashcards

Prednisone

Low cost and available only in oral form.

Signup and view all the flashcards

Corticosteroids with Food

To decrease GI upset.

Signup and view all the flashcards

High-Dose Corticosteroids Risk

Avascular necrosis of the head of the femur and humerus.

Signup and view all the flashcards

Short-Term Corticosteroid Use

Bursitis, tenosynovitis, arthritis.

Signup and view all the flashcards

Corticosteroids in Pregnancy

Preferred during the third trimester due to NSAID contraindication.

Signup and view all the flashcards

Cushing's Syndrome Cause

Long-term exposure to an excess of cortisol.

Signup and view all the flashcards

NSAIDs Effects

Analgesic, antipyretic, and anti-inflammatory.

Signup and view all the flashcards

NSAIDs Pain Relief

Inhibiting the COX enzymes.

Signup and view all the flashcards

Nonselective NSAIDs differences.

Potency, analgesic effectiveness, and duration of action.

Signup and view all the flashcards

Selective COX-2 Inhibitors

Equivalent analgesia but decreased GI toxicity.

Signup and view all the flashcards

NSAIDs Advantage

NSAIDs lack the unwanted adverse effects of opiates in the CNS.

Signup and view all the flashcards

NSAIDs Effectiveness

Effective against inflammatory pain of low to moderate intensity.

Signup and view all the flashcards

NSAIDs and Prostaglandins

Decreases inflammatory hyperalgesia and allodynia.

Signup and view all the flashcards

NSAIDs Primary Route

Oral.

Signup and view all the flashcards

Oral NSAID Absorption

Rapid, peak concentration within 3 hours.

Signup and view all the flashcards

NSAIDs Metabolized

Liver and excreted in the urine.

Signup and view all the flashcards

NSAID with Neutral Cardiac Profile

Naproxen.

Signup and view all the flashcards

Inflammation triggers

Damage- and pathogen-associated molecules recognized by immune system cells.

Signup and view all the flashcards

Local Corticosteroid Administration

High local concentration of steroid without serious systemic side effects.

Signup and view all the flashcards

Corticosteroids Main Differences

Potency, half-life, and fluid retention propensity.

Signup and view all the flashcards

Corticosteroids Dosing

Mimic cortisol surge, preventing delayed or incomplete healing.

Signup and view all the flashcards

Corticosteroids Instructions

Monitor schedule without deviation.

Signup and view all the flashcards

NSAIDs Action

Decreased recruitment of leukocytes and production of inflammatory mediators.

Signup and view all the flashcards

NSAID Elimination Dependence

Unbound fraction of the drug and liver enzyme activities.

Signup and view all the flashcards

NSAIDs Relationship

Dose-dependent relationship between concentration and therapeutic effects exists.

Signup and view all the flashcards

NSAIDs

Hepatic biotransformation and renal excretion.

Signup and view all the flashcards

Corticosteroid use cases

Acute rheumatic carditis and systemic lupus erythematosus.

Signup and view all the flashcards

Classic COX inhibitors action

Inhibit all types of COX enzyme activity.

Signup and view all the flashcards

Common NSAIDs

Variable half-life

Signup and view all the flashcards

Study Notes

  • Inflammation is a complex response to cell injury that occurs in vascularized connective tissue.
  • Inflammatory mediators eliminate the cause of injury and clear debris for tissue repair.
  • Noxious agents, infections, or injuries trigger the inflammatory response by releasing damage- and pathogen-associated molecules.
  • Immune system cells recognize these molecules, initiating the response.
  • Inappropriate intensity/duration can lead to chronic inflammation.
  • Anti-inflammatory drugs control inflammation and minimize pain.
  • Two main anti-inflammatory drug classes: corticosteroids (glucocorticoids) and NSAIDs.

Inflammatory Process

  • Acute phase response (inflammation) is a physiological response to tissue injury and infection.
  • Inflammation is not synonymous with infection, though their physiological responses are similar.
  • Vascular changes cause redness, heat, pain, and swelling.
  • Vasodilation and increased blood vessel wall permeability are consistent vascular responses.
  • Vasodilation increases blood flow (hyperemia), causing redness and heat.
  • Increased endothelial permeability allows plasma exudation, causing swelling and pain.
  • Local chemical mediators (cytokines) cause vascular changes.
  • Cytokines are released by damaged cells or synthesized in injured tissue.
  • Cytokine examples: histamine, bradykinin, prostaglandins.
  • Some cytokines sensitize sensory nerve endings, enhancing nociception and pain transmission.

Acute Inflammation

  • Three major phases: vascular, cellular, and tissue healing (granular).
  • Vascular phase: Vasoactive mediators (cytokines) dilate arterioles and shrink endothelial cells, increasing permeability.
  • Increased intracellular permeability allows extravasation of plasma, leading to swelling and pain.
  • Cellular phase: Chemotactic mediators target leukocytes, which adhere to endothelium (margination).
  • Leukocytes squeeze through openings (diapedesis) in capillaries and migrate into tissues (emigration).
  • Chemokines attract macrophages to inflammation site.
  • Tissue healing (granular) phase: Macrophages arrive at damaged tissue within 6 hours of onset.
  • Activated macrophages secrete proinflammatory cytokines: IL-1, IL-6, and TNF-α.
  • These cytokines induce coagulation, increase vascular permeability, and promote the acute-phase response.
  • Acute inflammation onset is rapid, resolves quickly, and pathology is typically mild and localized.
  • Acute inflammatory response is similar whether due to tissue injury or the body's attempt to limit invading pathogens.

Chronic Inflammation

  • Chronic inflammation results from continuous or repeated exposure to offending element/process.
  • Causes include continued tissue damage, persistent pathogens, autoimmune diseases, and cancers.
  • Hallmarks: accumulation/activation of macrophages and lymphocytes, fibroblast replacement of damaged tissue.
  • Soluble factors from macrophages and lymphocytes are important in development.
  • Fibroblast replacement leads to fibrosis, interfering with function due to excessive growth factors.
  • Excessive growth factors: platelet-derived, fibrogenic cytokines (IL-1, TNF-α), angiogenic factors (fibroblast growth factor, vascular endothelial growth factor).
  • Chronic inflammation can lead to granulomas: masses of activated macrophages surrounded by activated lymphocytes.

Controlling Inflammation

  • Drugs decrease joint pain, swelling, inflammation, and may prevent/minimize progression.
  • Two major anti-inflammatory drug categories: corticosteroids and NSAIDs.
  • NSAIDs inhibit the vascular phase of inflammation.
  • Corticosteroids primarily inhibit the cellular phase.
  • Corticosteroids alter the immune responses of lymphocytes.
  • Corticosteroid anti-inflammatory use does not address the underlying cause, but suppression is clinically useful.
  • Anti-inflammatory medications inhibit parts of arachidonic acid cascade.
  • Nonselective NSAIDs target cyclooxygenase (COX).
  • Corticosteroids prevent arachidonic acid liberation from plasma-membrane phospholipids, reducing eicosanoid synthesis.
  • NSAIDs are widely used for anti-inflammatory and analgesic effects.
  • NSAIDs are a necessary choice in pain management because of the integrated role of the COX pathway in the generation of inflammation and the biochemical recognition of pain.

Corticosteroids

  • Corticosteroids (glucocorticoids or steroids) are endogenous hormones, such as cortisol, secreted by the adrenal glands.
  • Cortisol is released in response to stress and has numerous effects on the body that are essential for life.
  • Corticosteroid medications are synthetic versions of cortisol (e.g., cortisone, prednisone, hydrocortisone) that reduce inflammation and suppress the immune system.
  • Corticosteroids have historically been used for pain relief in inflammatory conditions.
  • Corticosteroids are among the most frequently prescribed classes of drugs.
  • Extended administration and rapid withdrawal may cause serious side effects.
  • Decisions to institute therapy with systemic corticosteroids require careful consideration of risks and benefits.
  • Examples of corticosteroid medications are "the -ones" (e.g., prednisone, hydrocortisone), as their generic names end in "-one".

Corticosteroids - Therapeutic Effects

  • Corticosteroids inhibit the inflammatory response to tissue injury.
  • Endogenous corticosteroids suppress manifestations of allergic disease due to the release of histamine.
  • Anti-inflammatory effects require high levels of circulating corticosteroids.
  • The hypothalamic-pituitary-adrenal (HPA) axis can be suppressed in patients receiving corticosteroids for prolonged periods.
  • Large doses of exogenous corticosteroids inhibit ACTH release from the pituitary gland.
  • ACTH stimulates the release of cortisol from the adrenal cortex.
  • Reduced ACTH secretion can cause severe adrenal insufficiency if corticosteroid therapy is stopped abruptly.
  • Local administration of corticosteroids produces a high local concentration of the steroid without serious systemic side effects.
  • Main differences among corticosteroids are potency (dose), half-life, and propensity for fluid retention (sodium retention).

Steroid Hormones

  • Steroids are a large group with many different functions.
  • Corticosteroids, used to treat inflammation, are different than anabolic steroids.

Corticosteroids - Mechanism of Action

  • The primary mechanism of action of corticosteroids includes anti-inflammatory and immunosuppressive actions.
  • These drugs decrease inflammation by suppressing migration of polymorphonuclear leukocytes and reversing increased capillary permeability.
  • Multiple mechanisms involved in the suppression of inflammation by corticosteroids:
    • Inhibition of the production of factors critical for generating the inflammatory response
    • Decreased release of vasoactive and chemoattractive factors
    • Diminished secretion of lipolytic and proteolytic enzymes
    • Decreased extravasation of leukocytes to areas of injury
    • Decreased fibroblast activity at the site of injury
  • The anti-inflammatory effects of corticosteroids are largely due to a reduction in the synthesis or release of various inflammatory mediators, including prostaglandins.
  • Corticosteroids inhibit certain aspects of leukocyte function, accounting for their immunosuppressant effect.
  • The sum of the actions of corticosteriods results in suppression of the vascular changes responsible for the cardinal signs of inflammation.

Corticosteroids - Routes of Administration

  • Corticosteroids are used to treat a variety of inflammatory conditions.
  • Administration routes include:
    • Intravenously
    • Orally
    • Intra-articularly
    • Topically
    • Intralesionally
    • Transcutaneously
  • Corticosteroids marketed as anti-inflammatories are often topical formulations (e.g., nasal sprays for rhinitis or inhalers for asthma).
  • Generic oral formulations of prednisone, methylprednisolone, and triamcinolone typically last for 12 to 36 hours in the body, whereas dexamethasone and betamethasone last for 32 to 72 hours.
  • Prednisone is one of the most commonly used corticosteroids, available only in oral form, and is low cost.
  • These medications should be administered with food to decrease GI upset.
  • Depot preparations of methylprednisolone provide anti-inflammatory effects for 1 to 4 weeks.
  • Long-acting repository (depot) formulations are intended for intramuscular or intra-articular injection.

Corticosteroids - Pharmacodynamics and Pharmacokinetics

  • Corticosteroids are strikingly similar in their molecular structures and clinical effects.
  • All oral corticosteroids undergo first-pass metabolism during absorption.
  • When dosed equivalently, the various corticosteroids are equivalent in anti-inflammatory efficacy and have similar side-effect profiles, except for fluid retention.
  • Preparations are readily interchangeable, provided that equipotent doses are prescribed.

Corticosteroids - Dosing Guidelines

  • Dosing depends on the condition being treated and the patient's response.
  • For people who are taking corticosteroids long term, administer extra doses during times of acute stress, such as severe infection or surgery.
  • Corticosteroids mimic the cortisol surge that is normally produced by the body.
  • Discontinuation of therapy that has lasted longer than 7 days may require tapering of the drug to prevent adrenal crisis.
  • Standard formulations of prednisone, methylprednisolone, and triamcinolone last for around 12 to 36 hours in the body, whereas dexamethasone and betamethasone last for 32 to 72 hours.
  • Dose requirements are variable, individualized doses are based on disease and patient response.
  • A methylprednisolone (Medrol Dosepak) is a low-dose oral corticosteroid treatment course used in sports medicine to treat lower back injuries and other musculoskeletal conditions
  • Medrol Dosepak contains 21 tablets of methylprednisolone 4 mg that are taken over a 6-day period.
  • When corticosteroids are administered at recommended dosages for short durations of time, these potent anti-inflammatories are considered safe.
  • More regular or extended dosing has been associated with several severe adverse effects.
  • Use of high-dose corticosteroids, particularly long term, can cause avascular necrosis, especially of the head of the femur and humerus.
  • One hypothesis for avascular necrosis is that corticosteroids can increase lipid levels in the blood, thereby reducing blood flow.
  • Untreated, avascular necrosis worsens with time, and eventually the bone can collapse.
  • Avascular necrosis also causes bone to lose its smooth shape, potentially leading to severe arthritis.

Potential Consequences of Corticosteroid Use

  • Corticosteroids are used to treat spinal disc herniation, chronic tendinopathy, and autoimmune or inflammatory diseases.
  • Multiple studies have linked osteonecrosis of the hip to corticosteroid use.
  • High-dose corticosteroid use is the independent factor most frequently associated with the development of osteonecrosis, particularly of the femoral head.
  • A methylprednisolone (Medrol) taper pack (MTP) is a low-dose oral corticosteroid treatment. Little evidence exists linking a single course of MTP to osteonecrosis.
  • Osteonecrosis is responsible for >10% of all hip arthroplasties in the United States and Europe.

Corticosteroids - Indications and Precautions

  • Short-term administration of corticosteroids may be prescribed for acute and subacute bursitis, acute nonspecific tenosynovitis, ankylosing spondylitis, epicondylitis, posttraumatic osteoarthritis, and several types of arthritis.
  • During an exacerbation or as maintenance therapy, the prescriber may consider corticosteroids for select cases of acute rheumatic carditis, systemic dermatomyositis, and systemic lupus erythematosus.
  • Prolonged use of corticosteroids may result in immunosuppression, increasing the incidence of secondary infection.
  • Viral infections, such as chicken pox or measles, may have a more severe course in people taking corticosteroids.
  • High levels of exogenous corticosteroids for a prolonged time cause the hypothalamus to secrete less CRH, which reduces ACTH, thereby causing the adrenal glands to stop making cortisol.
  • Discontinuation of steroid medication should be withdrawn slowly over several days or weeks to allow the adrenal cortex to fully resume its functioning capacity again.
  • Sudden stop of use can cause acute adrenal insufficiency (Addison’s disease), and symptoms include irritability, nausea, joint pain, dizziness, and low blood pressure.

Corticosteroid Injections and Pregnancy

  • Corticosteroid use is preferred for pregnant women with musculoskeletal inflammation late in pregnancy because NSAIDs are contraindicated during the third trimester.
  • Corticosteroids are used during pregnancy to treat an autoimmune disorder of the mother that could be more harmful to fetal health than high doses of the medication.
  • A historical link was found between corticosteroids and cleft lip births; however, contemporary evidence indicates this incidence is modest.
  • Corticosteroid risks during pregnancy include preeclampsia, low birth weight, preterm birth, and potential hyperglycemia and ketoacidosis for the patient with gestational diabetes.
  • Corticosteroid use following birth can disturb normal lactation, but this is reversible after stopping use of the medication.

Corticosteroids - Adverse Effects

  • In cases of adrenal insufficiency, there is suppression of the HPA axis in patients receiving high doses of corticosteroids for prolonged periods of time.
  • With prolonged HPA axis suppression, the adrenal glands atrophy and may take months to recover full function after discontinuation of the exogenous corticosteroid.
  • Overuse of steroid joint injections may also result in adrenal suppression after their discontinuation.
  • HPA axis suppression may lead to acute adrenal crisis, a potentially life-threatening medical condition requiring immediate emergency treatment.
  • Withdrawal and discontinuation of a corticosteroid should be conducted slowly and carefully.
  • Patients receiving >20 mg per day of prednisone (or equivalent) may be most susceptible.
  • Patients prescribed corticosteroids need to follow precise instructions of the daily schedule without deviation.
  • Anaphylactoid reactions are rare but have been observed in patients receiving corticosteroids.
  • Side effects associated with corticosteroids:
    • Agitation and irritability
    • Blurred vision
    • Difficulty concentrating
    • Dizziness
    • Facial hair growth in female patients
    • Fast or irregular heartbeat
    • Fluid retention
    • Headache
    • High blood pressure
    • Increased blood sugar, cholesterol, or triglycerides
    • Increased risk of gastric ulcers or gastritis
    • Loss of potassium
    • Shortness of breath
    • Sleeplessness
    • Weight gain
  • Long-term use of exogenous corticosteroid therapy may cause abnormally high cortisol levels and lead to Cushing’s syndrome (hypercortisolism).
  • Typical undesired effects of corticosteroids present quite uniformly as drug-induced Cushing’s syndrome, caused by long-term exposure to an excess of cortisol.
  • Symptoms include a fatty (buffalo) hump between the shoulders, a round face, weight gain, irregular menstrual cycles, fatigue, and depression.
  • The AT should consult the prescriber with any additional questions or concerns.

Nonsteroidal Anti-Inflammatory Drugs

  • Nonsteroidal anti-inflammatory drugs (NSAIDs) are among the most commonly used groups of drugs.
  • More than 20 different NSAIDs are available commercially, and these agents are used worldwide.
  • All the NSAIDs have analgesic, antipyretic, and anti-inflammatory effects.
  • The traditional (nonselective) NSAIDs also have antithrombotic effects.
  • These medications relieve pain by blocking the production of pain-signaling molecules.
  • By inhibiting the COX enzymes, NSAIDs relieve pain in joints, muscles, and other soft tissues.
  • NSAIDs are a choice in pain management because of the integral role of the COX pathway in the generation of inflammation and the biochemical recognition of pain.
  • The agents differ with respect to their side effects, duration of action, degree of platelet antagonism (bleeding), and gastrointestinal toxicity.
  • Both traditional nonselective COX inhibitor NSAIDs and the selective cyclooxygenase COX-2 inhibitors are widely used for their anti-inflammatory and analgesic effects
  • The NSAIDs are grouped by their chemical similarity, which leads to functional similarity.
  • This chemical diversity yields a broad range of pharmacokinetic characteristics.
  • Although there are many differences in the kinetics of NSAIDs, the drugs have many general properties in common.

NSAIDS - Categories

  • Two major categories of NSAIDs:
    • Nonselective (traditional, classic, older) COX inhibitor NSAIDs—Vary primarily in their potency, analgesic and anti-inflammatory effectiveness, and duration of action. Some have better anti-inflammatory effectiveness and others have better analgesic effectiveness.
    • Selective (newer) cyclooxygenase-2 (COX-2) inhibitor NSAIDs—All named with the ending -coxib, these medications produce analgesia equivalent to that of the nonselective NSAIDs while decreasing the adverse effects, specifically the GI toxicity associated with chronic NSAID use.
  • Postclinical experience involving some of the highly selective COX-2 inhibitors has shown a higher incidence of cardiovascular thrombotic events than with the nonselective drugs.
  • Both rofecoxib (Vioxx) and valdecoxib (Bextra) have been withdrawn from the market because of an increased risk of adverse cardiovascular events.
  • Withdrawn NSAIDs had increased cardiovascular risks at high doses in the elderly (heart attack, stroke) and skin reactions.
  • Only celecoxib (Celebrex) is currently available for use in the United States despite having similar risks.

Cardiovascular Risk Associated With NSAIDs

  • Some drugs used to treat noncardiovascular conditions may adversely affect the cardiovascular status of patients both with and without known cardiovascular disease.
  • Findings from the Coxib and traditional NSAID Trialists’ (CNT) Collaboration revealed an increase in the incidence of myocardial infarction, stroke, and vascular death.
  • Major vascular events were increased by about a third by a coxib (rate ratio [RR] 1.37, 95% confidence interval [CI] 1.14-1.66; p = 0.0009).
  • The nonselective COX inhibitor, diclofenac, is primarily prescribed topically chiefly due to an increase in major coronary events
  • Diclofenac RR 1.70, CI 1.19-2.41; p = 0.0032.
  • Major vascular events and major coronary events were increased by diclofenac.

NSAIDs – Therapeutic Effects

  • The NSAIDs are antipyretic, analgesic, and anti-inflammatory medications.
  • NSAIDs provide mostly symptomatic relief from pain and inflammation associated with musculoskeletal disorders, such as strains, sprains, and various symptoms associated with rheumatoid arthritis and osteoarthritis.
  • Patients with more debilitating disease may require aggressive therapy with second-line agents such as analgesics or corticosteroids.
  • Genomic variation may also affect a person’s success rate with a particular NSAID; thus, there are >20 treatment options.
  • The NSAIDs are effective against inflammatory pain of low to moderate intensity.
  • Although their maximal efficacy is generally less than that of opioids, NSAIDs lack the unwanted adverse effects of opiates in the central nervous system (CNS), including respiratory depression and the potential for the development of physical dependence.
  • Coadministration of NSAIDs can reduce the opioid dose needed for sufficient pain control.
  • Ibuprofen can be prescribed in combination with hydrocodone to reduce opioid dose needed for sufficient pain control and thus reduce the likelihood of adverse opioid effects.
  • Although NSAIDs do not change the perception of sensory modalities other than pain, NSAIDs are particularly effective when inflammation has caused sensitization of pain perception.
  • Postoperative pain or pain arising from inflammation, such as arthritic pain, is controlled well by NSAIDs, whereas pain arising from the hollow viscera usually is not relieved.
  • Treatment of menstrual pain with NSAIDs is often useful.
  • NSAIDs are commonly used to treat migraine attacks and can be combined with antiemetics to aid relief of the associated nausea.
  • NSAIDs (and opioids) generally lack efficacy in neuropathic pain, such as diabetic neuralgia or pain associated with shingles (postherpetic neuralgia).
  • Ketorolac (Toradol) 60 mg administered intramuscularly (IM) has been shown to produce analgesia equivalent to morphine 10 mg IM for this type of pain.

NSAIDs - Mechanisms of Action

  • The classic COX inhibitors are not selective and inhibit all types of COX enzyme activity.
  • The classic COX inhibitors impair the ultimate transformation of arachidonic acid to prostaglandins, prostacyclin, and thromboxanes
  • Inhibition of prostaglandin and thromboxane synthesis results in reduced inflammation, as well as antipyretic, antithrombotic, and analgesic effects.
  • NSAIDs affect pain pathways in at least 3 ways:
    • Prostaglandins reduce the activation threshold at the peripheral terminals of primary afferent nociceptor neurons.
    • By reducing prostaglandin synthesis, NSAIDs decrease inflammatory hyperalgesia and allodynia.
    • NSAIDs decrease the recruitment of leukocytes and, thereby, the production of leukocyte-derived inflammatory mediators.
    • NSAIDs that cross the blood-brain barrier prevent the generation of prostaglandins that act as pain-producing neuromodulators in the spinal cord dorsal horn.

NSAIDs - Route of Administration

  • NSAIDs are used for the treatment of mild to moderate pain, especially the pain associated with musculoskeletal inflammation.
  • The primary route of NSAID administration is oral for both prescription and over-the-counter (OTC) medicines.
  • Ketorolac (Toradol) is the only NSAID routinely administered via the parenteral route.
  • Topical NSAIDs have decreased systemic exposure compared to the oral and intravenous formulations; therefore, they are expected to cause less serious side effects.
  • According to a recent Cochrane systematic review, diclofenac gel, ketoprofen gel, piroxicam gel, and diclofenac plaster work reasonably well for strains and sprains.
  • Topical diclofenac and topical ketoprofen rubbed on the skin for ≥6 weeks helped reduce pain by at least half in a modest number of people with hand and knee osteoarthritis
  • Methods that enhance transdermal delivery, such as iontophoresis or chemical penetration enhancers, continue to be investigated.
  • Although topical and oral NSAIDs may produce similar efficacy, patients receiving topical NSAIDs reported fewer GI side effects compared with those using oral formulations.
  • The cardiovascular and renal safety profile of topical NSAIDs remains to be assessed, and the possibility of skin rashes due to topical application of NSAIDs should be kept in mind.
  • The lower systemic exposure that is expected from topical usage may result in a better overall safety profile for these routes of administration.

NSAIDs - Pharmacokinetics

  • The major differences between NSAIDs are their therapeutic half-lives and safety profiles.
  • NSAIDs are systemic drugs that are distributed throughout the body and readily penetrate synovial joints.

NSAID - Absorption and Distribution

  • Most NSAIDs are acidic compounds with a relatively high bioavailability.
  • After oral administration, the absorption of NSAIDs is generally rapid, and peak plasma concentrations are reached within 3 hours.
  • Oral NSAIDs undergo hepatic first-pass metabolism, resulting in reduced bioavailability.
  • Food intake may delay absorption and systemic availability.
  • Antacids, commonly prescribed to patients on NSAID therapy, variably delay absorption.
  • Aspirin begins to acetylate platelets within minutes of reaching the presystemic circulation.
  • For distribution, NSAIDs bind to plasma proteins; they are usually metabolized in the liver and excreted in the urine.
  • Most NSAIDs are extensively bound (95% to 99%) to plasma proteins, usually albumin
  • They achieve sufficient concentrations in the CNS to have a central analgesic effect.
  • Most NSAIDs are distributed widely throughout the body and readily penetrate synovial joints, yielding synovial fluid concentrations in the range of half the plasma concentration.
  • The volume of distribution of NSAIDs is low, ranging from 0.1 to 0.3 L/kg, suggesting minimal tissue binding.
  • NSAID binding in plasma can be saturated when the concentration of the NSAID exceeds that of albumin.

NSAIDs - Metabolism and Excretion

  • Hepatic biotransformation and renal excretion are the principal routes of metabolism and elimination of the majority of NSAIDs.
  • Common NSAIDs have a variable half-life (t½).
  • Aspirin has a t½ of 0.25 to 0.3 hours.
  • Ibuprofen has a t½ of about 2 hours, is relatively safe, and is the least expensive of the traditional nonselective NSAIDs.
  • Naproxen has a comparatively long but highly variable t½ ranging from 12 to 17 hours.
  • Variation in the composition of the intestinal microbiome may contribute to variability in metabolism and elimination.
  • In general, NSAIDs are not recommended in patients with advanced hepatic or renal disease due to the drugs’ potential altered pharmacokinetic effects, which can potentiate increased adverse pharmacodynamic effects, including risk of bleeding and acute kidney injury.
  • NSAID elimination is dependent on the free (unbound) fraction of the drug within the plasma and the intrinsic enzyme activities of the liver to metabolize the drug to an excretable metabolite.

NSAIDs - Dosing Guidelines

  • Most patients take therapeutic doses of NSAIDs for short durations of time and usually tolerate them well.
  • NSAIDs have a dose-dependent relationship between concentration and therapeutic effects.
  • All NSAIDs pose dose- and age-related risks of gastropathy and renal impairment.
  • The enzyme COX-1 plays a role in protecting the stomach lining.
  • Because most NSAIDs block COX-1, they all increase the risk of stomach ulcers and GI bleeding.
  • Naproxen is the only NSAID with a neutral-positive cardiac profile.
  • Some selective NSAIDs, along with some of the nonselective COX-inhibitor NSAIDs, were found to increase the risk of heart attacks.

NSAIDs - Precautions

  • Safety concerns exist for NSAID use in patients with, or at elevated risk for, cardiovascular disease, diabetes, or thrombotic events.
  • NSAIDs should be avoided in patients with renal insufficiency
  • Major vascular events and major coronary events were increased by diclofenac.
  • Topical diclofenac and ketoprofen help reduce pain by at least half in people with hand and knee osteoarthritis when rubbed on the skin for at least 6 weeks.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Use Quizgecko on...
Browser
Browser