Chapter 7 - Drugs to Treat Pain: Nonopioid Analgesics

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Questions and Answers

What is the most common trade name for Acetaminophen in the United States?

  • Paracetamol
  • Paradol
  • Tylenol (correct)
  • Salonpas

Which drug is NOT a topical counterirritant?

  • Lidocaine (correct)
  • Camphor
  • Menthol
  • Capsaisin

Which of the following is NOT a therapeutic effect of Acetaminophen?

  • Reducing fever
  • Treating severe pain exclusively (correct)
  • Used in conjunction with opiates for severe pain
  • Treating mild to moderate pain

What is the most common use for Acetaminophen in the United States?

<p>Reducing fever in children (C)</p> Signup and view all the answers

What is the primary reason Acetaminophen became popular in the United States in the early 1980s?

<p>It was safer than aspirin for children (A)</p> Signup and view all the answers

What is the international generic name for Acetaminophen?

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

Based on the information provided, which of these conditions would Acetaminophen NOT be effective in treating?

<p>Severe pain from a broken bone (D)</p> Signup and view all the answers

Which statement accurately summarizes the text's explanation of Acetaminophen's anti-inflammatory activity?

<p>Acetaminophen has a low level of anti-inflammatory activity (B)</p> Signup and view all the answers

What is the primary concern regarding the use of acetaminophen during pregnancy?

<p>Low birth weight (B)</p> Signup and view all the answers

Which of the following statements regarding the use of local anesthetics is NOT true?

<p>Local anesthetics can provide long-term pain relief. (A)</p> Signup and view all the answers

What is a key characteristic of the absorption of local anesthetics once they cross the epidermis?

<p>Rapid absorption increases the risk of systemic toxicity. (B)</p> Signup and view all the answers

Which of the following is a method to reduce the risk of cocaine toxicity in anesthesia procedures?

<p>Replace cocaine with synthetic alternatives (D)</p> Signup and view all the answers

Which of the following describes the sensation order during treatment with local anesthetics?

<p>Loss of pain followed by loss of deep pressure. (B)</p> Signup and view all the answers

In the context of asthma, what percentage of aspirin-sensitive asthmatics report sensitivity to acetaminophen?

<p>34% (A)</p> Signup and view all the answers

What is the typical presentation of local anesthetic systemic toxicity (LAST)?

<p>Prodromal symptoms such as perioral numbness and tinnitus. (C)</p> Signup and view all the answers

Which local anesthetic is commonly used in the sports medicine setting historically alongside cocaine?

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

What is the primary downside of acetaminophen regarding inflammation in arthritis treatment?

<p>It has no effect on the underlying inflammation. (A)</p> Signup and view all the answers

Which mechanism is primarily responsible for the pain-relieving effects of acetaminophen?

<p>Inhibition of neurotransmitters in the CNS. (D)</p> Signup and view all the answers

What is the maximum recommended daily dosage of acetaminophen for adults?

<p>4,000 mg (B)</p> Signup and view all the answers

Which factor may increase the risk of hepatotoxicity when taking acetaminophen?

<p>Prior hepatic disease. (C)</p> Signup and view all the answers

What is one of the primary concerns associated with acetaminophen misuse?

<p>Risk of liver failure due to unintended overdose. (D)</p> Signup and view all the answers

What additional substance may enhance the analgesic effects of acetaminophen when combined?

<p>Caffeine (D)</p> Signup and view all the answers

In which form is acetaminophen primarily administered in a sports medicine setting?

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

Which of the following is NOT a side effect of acetaminophen overdose?

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

What is the half-life of acetaminophen?

<p>1 to 3 hours (B)</p> Signup and view all the answers

What should athletes be cautious about when overlapping medications containing acetaminophen?

<p>The potential for unintended acetaminophen toxicity. (A)</p> Signup and view all the answers

Which acetaminophen product is commonly used for cold symptoms in the United States?

<p>Theraflu Multi-Symptom Severe Cold (C)</p> Signup and view all the answers

Which statement best describes the effect of food intake on acetaminophen absorption?

<p>It has no significant effect. (B)</p> Signup and view all the answers

What adverse effect is specifically documented as a consequence of high acetaminophen doses?

<p>Permanent liver damage. (C)</p> Signup and view all the answers

Besides pain relief and fever reduction, what other condition is acetaminophen useful in treating?

<p>Acetaminophen is also useful in treating moderate to severe pain when used in conjunction with opiates.</p> Signup and view all the answers

What is one reason that acetaminophen is recommended for children with a fever?

<p>Acetaminophen is recommended to treat fever in children because it has minimal risk and avoids the chance of Reye's Syndrome, which is associated with aspirin use.</p> Signup and view all the answers

What are three types of topical medications listed in the provided table?

<p>Topical medications include counterirritants, local creams, and transdermal patches.</p> Signup and view all the answers

Considering its mechanism, why is acetaminophen not considered an ideal treatment for inflammatory conditions such as rheumatoid arthritis?

<p>Acetaminophen has relatively little anti-inflammatory activity compared to other analgesics, meaning it would not primarily address the root cause of inflammation.</p> Signup and view all the answers

Name three conditions that acetaminophen effectively treats besides fever reduction according to the text.

<p>Acetaminophen can treat conditions such as headache, muscle aches, and toothaches.</p> Signup and view all the answers

What are the generic names for two local injectable anesthetics, mentioned in the text, beside lidocaine?

<p>Bupivacaine, and procaine are both local injectable anesthetics.</p> Signup and view all the answers

How would you categorize the onset and duration of acute pain?

<p>Acute pain is of sudden onset and expected to last a short time.</p> Signup and view all the answers

What are the three components of the biopsychosocial model, as named here?

<p>The three components are the biological, the psychological, and the social.</p> Signup and view all the answers

Besides musculoskeletal pain, what are two specific concerns related to acetaminophen use?

<p>Asthma sensitivity and complications during pregnancy such as preterm birth, low birth weight, and poor gross motor development.</p> Signup and view all the answers

Why was procaine developed as a substitute for cocaine in local anesthesia?

<p>To mitigate the toxicity, abuse, misuse, and addictive properties of cocaine.</p> Signup and view all the answers

In what order does the loss of sensation typically occur during treatment with local anesthetics?

<p>Pain, temperature, touch, deep pressure, and finally motor function.</p> Signup and view all the answers

What is the main obstacle that local anesthetics must overcome to reach sensory neurons in the epidermis?

<p>The stratum corneum.</p> Signup and view all the answers

What are the potential early symptoms of local anesthetic systemic toxicity (LAST)?

<p>Perioral numbness, tinnitus, agitation, dysarthria and confusion.</p> Signup and view all the answers

What is the main concern regarding the use of a mixture of tetracaine, epinephrine, and cocaine (TAC) in sports medicine?

<p>Concerns over cocaine's toxicity, banned substance status, and the risk of addiction.</p> Signup and view all the answers

Why is acetaminophen considered a better choice than NSAIDs for musculoskeletal pain, despite its link to liver damage?

<p>At recommended dosages, acetaminophen is a better analgesic choice.</p> Signup and view all the answers

What is Emla cream and what is it used for?

<p>It is a eutectic mixture of local anesthetics such as lidocaine and prilocaine, and is used as an alternative to TAC.</p> Signup and view all the answers

Besides pain relief, what other symptom is acetaminophen effective in treating?

<p>Fever.</p> Signup and view all the answers

What is the primary difference between how acetaminophen and NSAIDs address inflammation?

<p>Acetaminophen does not reduce inflammation, while NSAIDs do.</p> Signup and view all the answers

What specific organ is most susceptible to toxicity from excessive acetaminophen dosage?

<p>The liver.</p> Signup and view all the answers

What are the initial symptoms of hepatotoxicity caused by acetaminophen overdose?

<p>Nausea, vomiting, and diarrhea.</p> Signup and view all the answers

What is the maximum recommended daily dose of acetaminophen, in milligrams, to avoid potential liver damage?

<p>4,000 mg.</p> Signup and view all the answers

What is the process by which acetaminophen is primarily absorbed into the body?

<p>Absorption in the small intestine.</p> Signup and view all the answers

How does the combination of caffeine affect the absorption and excretion of acetaminophen?

<p>Caffeine accelerates absorption and slows excretion.</p> Signup and view all the answers

What is an example of a combination medication that contains both acetaminophen and a decongestant?

<p>Theraflu Multi-Symptom Severe Cold.</p> Signup and view all the answers

Why do athletic trainers need to be aware of the acetaminophen content in multiple medications an athlete might be taking?

<p>To prevent accidental overdose due to combined acetaminophen from multiple sources.</p> Signup and view all the answers

Besides overdose, what other patient factor can increase the likelihood of hepatotoxicity from acetaminophen?

<p>Pre-existing hepatic disease, poor nutrition, or heavy alcohol use.</p> Signup and view all the answers

How does acetaminophen provide pain relief in the body, according to the provided information?

<p>Through inhibiting neurotransmitters in the CNS and activation of descending serotonergic inhibitory pathways.</p> Signup and view all the answers

What are the two categories of medication that acetaminophen falls under based on its effects?

<p>Analgesic and Antipyretic.</p> Signup and view all the answers

Which route of administration is most commonly used for acetaminophen in the sports medicine setting?

<p>Oral.</p> Signup and view all the answers

What effect does acetaminophen have on the underlying inflammation of arthritis?

<p>It has no effect.</p> Signup and view all the answers

What characteristic of acetaminophen, related to bleeding concerns, makes it preferable to aspirin?

<p>It does not have anticoagulant or bleeding effects like aspirin.</p> Signup and view all the answers

If a child has a fever of 39°C, should acetaminophen be considered for treatment? Explain why or why not.

<p>Yes, acetaminophen should be considered. The WHO recommends it for children with a temperature greater than 38.5°C, so 39°C is above this threshold.</p> Signup and view all the answers

Explain the difference in function between a topical counterirritant and a local anesthetic cream, according to the provided text.

<p>Topical counterirritants create a sensation to distract from pain, while local anesthetic creams numb the area by blocking nerve signals. They work via different mechanisms.</p> Signup and view all the answers

If a patient has a headache and arthritis pain, and wants to take only one over-the-counter (OTC) medication, why might acetaminophen be considered a good choice, based on the provided text?

<p>Acetaminophen is a good choice because it treats both mild to moderate pain, like a headache, and arthritis pain, as well as decreases fever, if present.</p> Signup and view all the answers

What is the primary reason why topical lidocaine is available in both cream and transdermal patch forms?

<p>The cream offers localized application with quick action, while the patch provides extended relief through sustained drug delivery, accommodating varied needs.</p> Signup and view all the answers

The text mentions that acetaminophen is often used with opiates. Why might this combination be used?

<p>Acetaminophen is used with opiates to treat moderate to severe pain due to acetaminophen's analgesic effectiveness and opiate's strong pain-relieving effects.</p> Signup and view all the answers

Given the provided information, why might a healthcare provider consider using a local injectable anesthetic instead of a topical anesthetic for a deep tissue procedure?

<p>Local injectable anesthetics can penetrate deeper tissues than creams, providing anesthesia to deeper areas and avoiding drug absorption.</p> Signup and view all the answers

How is the social component, as mentioned, a vital part of the biopsychosocial model when considering a patient's pain management?

<p>The social component acknowledges that life experiences, cultural background, relationships, and support systems may affect pain tolerance and thresholds.</p> Signup and view all the answers

What does the text suggest about the role of acetaminophen in comparison to NSAIDs in reducing inflammation?

<p>The text suggests that unlike NSAIDs, acetaminophen has relatively little anti-inflammatory activity, and it is not an ideal analgesic for inflammation.</p> Signup and view all the answers

What specific physiological process is inhibited by acetaminophen to achieve its antipyretic effect?

<p>Acetaminophen inhibits the hypothalamic heat-regulating center.</p> Signup and view all the answers

Besides oral tablets, name two other routes of administration for acetaminophen.

<p>Acetaminophen can be administered rectally, buccally, or intravenously.</p> Signup and view all the answers

What is the primary mechanism by which caffeine enhances the analgesic effect of acetaminophen?

<p>Caffeine accelerates the absorption and slows the excretion of acetaminophen.</p> Signup and view all the answers

How does acetaminophen achieve pain relief through its action on the central nervous system (CNS)?

<p>Acetaminophen inhibits neurotransmitters and activates descending serotonergic inhibitory pathways in the CNS.</p> Signup and view all the answers

What is the significance of the 3,250 mg/day dosage guideline for acetaminophen, and how does it relate to the maximum daily dose of 4,000 mg?

<p>3,250 mg/day is the recommended safe dose, while 4,000 mg/day is the maximum dose that should not be exceeded to avoid liver damage.</p> Signup and view all the answers

Besides liver damage, what are the typical initial symptoms of acetaminophen toxicity?

<p>Initial symptoms of hepatotoxicity include nausea, vomiting, and diarrhea.</p> Signup and view all the answers

In the context of sports medicine, what is the major concern when athletes take multiple medications that contain acetaminophen?

<p>The risk of exceeding the recommended daily dose of acetaminophen, leading to potential liver damage.</p> Signup and view all the answers

Explain why acetaminophen is considered a better analgesic choice than NSAIDs for musculoskeletal pain despite its potential for liver damage.

<p>Acetaminophen is associated with less severe side effects than NSAIDs in safe dosages, and does not have anticoagulant effects.</p> Signup and view all the answers

What is the primary route by which acetaminophen is absorbed in the body after oral ingestion?

<p>Acetaminophen is primarily absorbed in the small intestine.</p> Signup and view all the answers

What are the main differences between the pharmacodynamic effects of acetaminophen compared to NSAIDs, in terms of inflammation?

<p>Unlike NSAIDs, acetaminophen is not considered an anti-inflammatory medication and primarily works on pain and fever.</p> Signup and view all the answers

Given its mechanism of action, why is acetaminophen not effective in treating the inflammation associated with rheumatoid arthritis?

<p>Acetaminophen does not act on the inflammatory process of rheumatoid arthritis.</p> Signup and view all the answers

If an athlete were to take both Theraflu and an additional pain killer that contains acetaminophen, what would be a major risk, and what specific dose, per day, should they not cross?

<p>Major risk is exceeding the daily maximum dose of 4,000mg which could lead to liver damage.</p> Signup and view all the answers

Describe how prior hepatic disease or alcohol use can affect an individual's risk when using acetaminophen.

<p>Prior hepatic disease or heavy alcohol use increases the risk of hepatotoxicity because the liver is more sensitive to acetaminophen's toxicity.</p> Signup and view all the answers

Explain why it is important to consider acetaminophen dosages in overlapping medications, especially for an athletic trainer (AT)?

<p>ATs must be aware of combined doses to prevent inadvertent toxicity due to multiple medications that contain acetaminophen.</p> Signup and view all the answers

Considering the absorption rate of acetaminophen, why can it be taken without regard to meals?

<p>The absorption rate among most adults is not significantly affected by either fasting or having eaten a light meal.</p> Signup and view all the answers

What is the primary reason Andean natives chewed coca leaves for centuries, and how does this relate to the discovery of local anesthetics?

<p>Andean natives chewed coca leaves for their stimulatory and euphoric effects. The discovery of cocaine's anesthetic properties led to the development of synthetic local anesthetics.</p> Signup and view all the answers

Why does the text state that local anesthetics are absorbed rapidly into the circulation once they have crossed the epidermis?

<p>Local anesthetics are absorbed rapidly into the circulation because of the high vascularity in the area beneath the epidermis.</p> Signup and view all the answers

Why was the mixture of tetracaine, epinephrine, and cocaine (TAC) replaced by lidocaine and prilocaine mixtures in sports medicine?

<p>TAC was replaced due to concerns about cocaine toxicity, the risk of addiction, and it being a banned substance.</p> Signup and view all the answers

Explain why acetaminophen might be preferred over NSAIDs for an athlete with a potential liver injury, despite the link between acetaminophen and liver damage.

<p>At recommended dosages, acetaminophen is preferable due to lower risks and side effects compared with NSAIDs.</p> Signup and view all the answers

Aside from the contraindication during pregnancy, explain the mechanism by which acetaminophen use might lead to breathing difficulty in some asthmatics.

<p>Acetaminophen sensitivity can occur in some aspirin-sensitive asthmatics. It is not well described, but is thought that the mechanism may have to do with changes in the respiratory pathways from aspirin use.</p> Signup and view all the answers

Describe the specific order of sensation loss caused by local anesthetics, as indicated by the text, and explain why this sequence might be important clinically.

<p>Pain disappears first, then temperature, touch, deep pressure, and finally motor function. This order is important because it helps clinicians understand the anesthetic effects and recovery.</p> Signup and view all the answers

Beyond its anesthetic benefits, what specific risk is associated with the administration of local anesthetics into the blood stream, and what are the signs?

<p>Systemic toxity, known as LAST, can occur. The symptoms are perioral numbness, tinnitus, agitation, dysarthria, and confusion.</p> Signup and view all the answers

Contrast the mechanism of action of local anesthetics with that of acetaminophen, based on the information provided, regarding Aβ-fibers and C-fibers.

<p>Local anesthetics target Aβ-fibers and C-fibers in the epidermis, disrupting nerve signals, while acetaminophen's mechanism is not fully described in the text, but its analgesic effects are not exerted by affecting nerve signals in the peripheral nervous system.</p> Signup and view all the answers

Which of the following are trade names for acetaminophen?

<p>Tylenol (A), Paradol (E)</p> Signup and view all the answers

Acetaminophen is effective in treating both mild to moderate pain and severe pain.

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

What is the generic name for the drug commonly known as Xylocaine?

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

Acetaminophen is a ______ analgesic.

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

Match the following drug classes with their corresponding examples:

<p>Analgesics = Acetaminophen, Camphor Anesthetics = Bupivacaine, Lidocaine Topical Counterirritants = Capsaicin, Menthol Ophthalmic = Tetracaine</p> Signup and view all the answers

Acetaminophen is considered a safe alternative to aspirin for children with fever due to its lack of association with Reye’s Syndrome.

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

What is one specific concern related to acetaminophen use, besides its potential link to musculoskeletal pain?

<p>Liver damage</p> Signup and view all the answers

Which of the following is a complication associated with acetaminophen use during pregnancy?

<p>Preterm birth (D)</p> Signup and view all the answers

Acetaminophen is considered a better analgesic choice than NSAIDs for managing musculoskeletal pain.

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

What is the primary concern associated with local anesthetic systemic toxicity (LAST)?

<p>It is a life-threatening adverse event.</p> Signup and view all the answers

Acetaminophen has been reported to cause asthma sensitivity in _____ of people who are aspirin-sensitive asthmatics.

<p>34%</p> Signup and view all the answers

Match the following local anesthetics with their characteristics:

<p>Lidocaine = Commonly used in sports medicine Bupivacaine = Longer-lasting local anesthetic Tetracaine = Short-acting local anesthetic Prilocaine = Used in Emla cream for pain relief</p> Signup and view all the answers

What is one of the earliest symptoms of local anesthetic systemic toxicity (LAST)?

<p>Perioral numbness (A)</p> Signup and view all the answers

Cocaine was the first local anesthetic discovered and is still widely used today due to its effectiveness.

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

What is the major obstacle local anesthetics must overcome to reach sensory neurons in the epidermis?

<p>The stratum corneum</p> Signup and view all the answers

What is the primary effect of acetaminophen in treating arthritis?

<p>Relieves pain (D)</p> Signup and view all the answers

Acetaminophen is considered an anti-inflammatory medication.

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

What is the safe daily dosage of acetaminophen for adults?

<p>3,250 mg</p> Signup and view all the answers

Acetaminophen overdose can lead to _____ and liver failure.

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

Match the medication to its trade name:

<p>Acetaminophen = Tylenol Paracetamol = Panadol Caffeine = Excedrin Hydrocodone/Aspirin = Norco</p> Signup and view all the answers

What is NOT a characteristic of acetaminophen?

<p>Anti-inflammatory effect (A)</p> Signup and view all the answers

Acetaminophen can be taken without regard to meals.

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

What organ is most susceptible to toxicity due to high doses of acetaminophen?

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

Caffeine can enhance the analgesic effects of acetaminophen when combined in products like _____ .

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

What is a common initial symptom of acetaminophen overdose?

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

Acetaminophen should be limited to a maximum of 6,000 mg per day to avoid liver damage.

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

Which common cold medication contains acetaminophen as an active ingredient?

<p>Theraflu Multi-Symptom Severe Cold</p> Signup and view all the answers

In the sports medicine context, acetaminophen is primarily administered via the _____ route.

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

Acetaminophen has significant anti-inflammatory activity similar to NSAIDs.

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

What is the international name for acetaminophen?

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

One of the three components of the biopsychosocial model is the ______ factor, which includes stress and predisposing factors.

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

Match the following drug classes with their examples:

<p>Analgesics = Acetaminophen Local Anesthetics = Lidocaine Topical Counterirritants = Menthol</p> Signup and view all the answers

According to the information, what is the WHO recommendation for treating fever in children using acetaminophen?

<p>Use for temperatures above 38.5°C (101.3°F). (A)</p> Signup and view all the answers

Acute pain is characterized by a slow onset and long duration.

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

Besides fever, name 2 other conditions that acetaminophen is commonly used to treat.

<p>headache, muscle aches (or similar)</p> Signup and view all the answers

Which of the following is NOT a typical prodromal symptom of local anesthetic systemic toxicity (LAST)?

<p>Bradycardia (D)</p> Signup and view all the answers

Acetaminophen is considered a first-line treatment for reducing inflammation associated with rheumatoid arthritis.

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

What is the primary reason that alternatives to TAC (tetracaine, epinephrine, and cocaine) are now preferred in sports medicine?

<p>concerns about cocaine toxicity and addiction</p> Signup and view all the answers

Local anesthetics work by blocking sensory neurons in the epidermis known as _ _ _ and C-fibers.

<p>Aβ-fibers</p> Signup and view all the answers

Match the following local anesthetics with their description:

<p>Cocaine = First local anesthetic, extracted from coca leaves Procaine = Synthetic substitute for cocaine, prototype for local anesthetics Lidocaine = Widely used agent today Tetracaine = Component of TAC, ester</p> Signup and view all the answers

Which of the following is a common complication of acetaminophen use during pregnancy?

<p>Preterm birth (C)</p> Signup and view all the answers

Local anesthetics cause a loss of motor function before the sensation of pain disappears.

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

What is the main barrier that local anesthetics must cross to reach sensory fibers?

<p>stratum corneum</p> Signup and view all the answers

What serious complication may occur due to the use of local anesthetics?

<p>Local anesthetic systemic toxicity (LAST) (D)</p> Signup and view all the answers

Acetaminophen is known to be safe for use during all stages of pregnancy without any concerns.

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

What is the primary reason procaine was developed?

<p>To provide a safer alternative to cocaine for local anesthesia.</p> Signup and view all the answers

The first local anesthetic discovered was _____ .

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

Match the local anesthetic to its primary application:

<p>Lidocaine = Commonly used in dental procedures Bupivacaine = Long-lasting pain relief for labor Tetracaine = Topical anesthetic for minor skin procedures</p> Signup and view all the answers

Which of the following local anesthetics has a prolonged duration of action?

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

What are the main sensory functions lost during treatment with local anesthetics?

<p>Pain, temperature, touch, deep pressure, motor function.</p> Signup and view all the answers

Which drug is commonly used for treating muscle aches and reducing fever?

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

Acetaminophen has a significant anti-inflammatory effect similar to NSAIDs.

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

What role does Acetaminophen play in treating fever?

<p>It acts as an antipyretic to reduce fever.</p> Signup and view all the answers

The trade name for Acetaminophen is __________.

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

Match the following anesthetics with their respective routes of administration:

<p>Bupivacaine = Local injectable Lidocaine = Transdermal patch Procaine = Local injectable Tetracaine = Ophthalmic</p> Signup and view all the answers

What is a common side effect of excessive acetaminophen use?

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

Acetaminophen is known internationally as __________.

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

Local anesthetics such as lidocaine can be applied as a transdermal patch.

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

Which of the following is a primary route of acetaminophen administration in the sports medicine setting?

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

What is the maximum recommended daily dosage of acetaminophen for adults to avoid liver damage?

<p>4000 mg</p> Signup and view all the answers

Acetaminophen is primarily absorbed in the __________.

<p>small intestine</p> Signup and view all the answers

Match the following acetaminophen product names with their corresponding trade names:

<p>Acetaminophen = Tylenol Paracetamol = Panadol</p> Signup and view all the answers

What is a significant adverse effect linked to acetaminophen overdose?

<p>Liver failure (D)</p> Signup and view all the answers

Acetaminophen has a faster onset of action than ibuprofen.

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

What ingredient can enhance the analgesic effects of acetaminophen when combined in a product?

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

The liver is essential in transforming and clearing chemicals and is susceptible to toxicity from __________ medications.

<p>first-pass</p> Signup and view all the answers

What initial symptoms may indicate hepatotoxicity after acetaminophen overdose?

<p>Nausea, vomiting, and diarrhea (D)</p> Signup and view all the answers

Acetaminophen is better tolerated than aspirin primarily due to its anticoagulant properties.

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

What condition may worsen the risk of hepatotoxicity when taking acetaminophen?

<p>prior hepatic disease</p> Signup and view all the answers

Acetaminophen comes in strengths of __________ mg and __________ mg in the United States.

<p>325, 500</p> Signup and view all the answers

Match the following acetaminophen-related risks with their explanations:

<p>Unintended overdose = Represents 50% of all liver failure cases Heavy alcohol use = Increases risk of liver toxicity</p> Signup and view all the answers

Which drug is typically classified as a topical counterirritant?

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

What is a characteristic of acute pain?

<p>It has a sudden onset. (A)</p> Signup and view all the answers

Which of the following anesthetics is delivered through a transdermal patch?

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

What role does acetaminophen primarily serve in treating fever?

<p>It's an antipyretic with minimal risk. (B)</p> Signup and view all the answers

Which drug class does lidocaine belong to?

<p>Local anesthetics (A)</p> Signup and view all the answers

Which of the following medications is NOT typically used in conjunction with opioids for pain management?

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

What is the primary characteristic of the biopsychosocial model's biological component?

<p>The extent of physical illness or predisposition affecting pain. (B)</p> Signup and view all the answers

What is a common therapeutic effect of acetaminophen?

<p>Relieves mild to moderate pain. (B)</p> Signup and view all the answers

Which complication is specifically associated with acetaminophen use in pregnant individuals?

<p>Preterm birth (D)</p> Signup and view all the answers

What is a key reason why cocaine was replaced with synthetic substitutes in local anesthetics?

<p>Cocaine can lead to toxicity and addictive properties (D)</p> Signup and view all the answers

Which local anesthetic formulation is commonly used before suturing small cuts in the sports medicine setting, despite safety concerns?

<p>TAC (tetracaine, epinephrine, and cocaine) (A)</p> Signup and view all the answers

Which symptom is typically an early indication of local anesthetic systemic toxicity (LAST)?

<p>Perioral numbness (B)</p> Signup and view all the answers

Why is the stratum corneum a significant barrier for local anesthetics?

<p>It hinder the passage of anesthetics to the Aβ-fibers and C-fibers (C)</p> Signup and view all the answers

Which local anesthetic is often associated with lasting toxicity concerns in sports medicine?

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

What potential effect does acetaminophen have on individuals with asthma sensitivity?

<p>Heightened asthma attacks (B)</p> Signup and view all the answers

What is the primary advantage of using acetaminophen over NSAIDs for musculoskeletal pain, despite its risks?

<p>Acetaminophen is less likely to cause gastric irritation (D)</p> Signup and view all the answers

What is the recommended safe daily dosage of acetaminophen for adults?

<p>3,250 mg (A)</p> Signup and view all the answers

How does acetaminophen primarily relieve pain?

<p>Through inhibition of neurotransmitters in the CNS (A)</p> Signup and view all the answers

Which of the following medications should ATs monitor closely due to acetaminophen content?

<p>Norco (D)</p> Signup and view all the answers

Which of the following best describes acetaminophen’s relationship with inflammation?

<p>It only relieves pain, not inflammation. (A)</p> Signup and view all the answers

What adverse effect can arise from exceeding the recommended dosage of acetaminophen?

<p>Hepatotoxicity (D)</p> Signup and view all the answers

Which route of administration is most common for acetaminophen in sports medicine?

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

How long does it typically take for acetaminophen to exert its effects after oral administration?

<p>1 hour (D)</p> Signup and view all the answers

Which population is at the highest risk for acetaminophen-induced hepatotoxicity?

<p>Individuals with prior hepatic disease (B)</p> Signup and view all the answers

Which of the following is a common early symptom of acetaminophen hepatotoxicity?

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

Which medication commonly used for cold symptoms contains acetaminophen?

<p>Theraflu Multi-Symptom Severe Cold (A)</p> Signup and view all the answers

What effect does caffeine have on the absorption of acetaminophen?

<p>It enhances absorption. (B)</p> Signup and view all the answers

Acetaminophen is especially considered safe for use in which demographic?

<p>Infants and young children (D)</p> Signup and view all the answers

What should ATs be aware of when administering acetaminophen to athletes?

<p>It may result in cumulative dosage from multiple medications. (A)</p> Signup and view all the answers

What is one disadvantage of using acetaminophen for pain management compared to NSAIDs?

<p>No anti-inflammatory properties (B)</p> Signup and view all the answers

Which of the following is NOT an alternative to the TAC mixture?

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

What is the primary reason for using alternatives to the traditional TAC mixture in sports medicine?

<p>Concerns about cocaine toxicity, banned substances, and addiction (D)</p> Signup and view all the answers

According to this text, what specific risk is associated with the use of acetaminophen in pregnant women?

<p>Potential for preterm birth, low birth weight, and poor development in the child (D)</p> Signup and view all the answers

What is the primary concern associated with the use of local anesthetics once they are absorbed into the circulation?

<p>Risk of systemic toxicity (C)</p> Signup and view all the answers

Which of the following is NOT listed as a typical early symptom of local anesthetic systemic toxicity (LAST)?

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

What characteristic of the stratum corneum makes it a significant barrier for topical anesthetics?

<p>It is the outermost layer of the epidermis (A)</p> Signup and view all the answers

Which of the following is NOT a consideration for acetaminophen use in athletes?

<p>Potential for muscle wasting (A)</p> Signup and view all the answers

What was the original purpose of chewing coca leaves by Andean natives?

<p>For their stimulatory and euphoric effects (C)</p> Signup and view all the answers

What is the primary mechanism through which acetaminophen reduces fever?

<p>Inhibition of the hypothalamic heat-regulating center. (A)</p> Signup and view all the answers

What is a significant concern related to the use of acetaminophen in patients with hepatic disease?

<p>Increased susceptibility to hepatotoxicity due to impaired liver function. (C)</p> Signup and view all the answers

Which of these statements accurately describes acetaminophen's role in managing arthritis pain?

<p>Acetaminophen helps manage pain in mild arthritis, but does not address the inflammation. (D)</p> Signup and view all the answers

How does caffeine affect acetaminophen's absorption and excretion?

<p>Caffeine accelerates absorption of acetaminophen, while slowing down its excretion. (D)</p> Signup and view all the answers

What is the recommended safe daily dose of acetaminophen in milligrams for an adult, as per the provided text?

<p>3,250 mg/day (C)</p> Signup and view all the answers

Why is awareness of dosage amounts important when using multiple medications containing acetaminophen?

<p>To avoid exceeding the maximum daily dose, thus preventing the risk of liver damage. (A)</p> Signup and view all the answers

How does the onset of action for acetaminophen compare to other analgesics in typical use cases?

<p>Acetaminophen has a relatively slow onset of action, taking around 24 hours for effectiveness. (A)</p> Signup and view all the answers

What is the primary advantage of acetaminophen over aspirin in the context of pain relief?

<p>Acetaminophen lacks the anticoagulant effects seen with aspirin, making it suitable for those with bleeding risk. (A)</p> Signup and view all the answers

What is the significance of acetaminophen being an 'OTC' medication?

<p>It is available to purchase without a prescription. (D)</p> Signup and view all the answers

Which route of administration of acetaminophen is MOST common in a sports medicine setting?

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

How does the risk of hepatotoxicity related to acetaminophen use tend to differ between individuals with and without certain conditions?

<p>Individuals with prior hepatic disease, poor nutritional status or heavy alcohol use tend to be at higher risk of hepatotoxicity due to compromised liver function. (D)</p> Signup and view all the answers

What does the text suggest about the potential benefit of combining acetaminophen with caffeine?

<p>Caffeine may enhance the analgesic effect of acetaminophen by accelerating its absorption and slowing its excretion. (D)</p> Signup and view all the answers

What is the typical presentation of acute hepatotoxicity from acetaminophen overdose?

<p>Initially, nausea, vomiting, and diarrhea, followed by liver damage approximately 3 days after ingestion. (A)</p> Signup and view all the answers

What is the significance of the half-life of acetaminophen in determining its dosing schedule?

<p>The half-life dictates how fast the drug is eliminated, impacting how often the drug must be taken to maintain consistent effect. (D)</p> Signup and view all the answers

What is the primary concern when an athlete takes a cold medication containing acetaminophen alongside another medication for pain?

<p>The athlete may exceed the recommended daily dose of acetaminophen increasing the risk of liver damage. (D)</p> Signup and view all the answers

What therapeutic characteristic differentiates acetaminophen from NSAIDs?

<p>It primarily reduces fever. (D)</p> Signup and view all the answers

Which of the following local anesthetics is commonly known as Xylocaine?

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

What is a common brand name for the topical cream containing lidocaine?

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

What factor is NOT considered a component of the biopsychosocial model?

<p>Environmental (D)</p> Signup and view all the answers

Which type of pain is characterized by a sudden onset and typically lasts a short duration?

<p>Acute pain (C)</p> Signup and view all the answers

Which of the following local anesthetics is often used in combination with epinephrine and cocaine?

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

What is a significant risk associated with excessive doses of acetaminophen?

<p>Hepatotoxicity (D)</p> Signup and view all the answers

Flashcards

Acetaminophen

A nonopioid analgesic used to treat mild to moderate pain and reduce fever.

Paracetamol

Another name for acetaminophen, particularly used internationally.

Topical counterirritants

Substances applied to the skin to relieve pain by causing irritation.

Local anesthetics

Medications used to block sensation in specific areas of the body.

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Biosychosocial model

A framework that considers biological, psychological, and social factors in health and illness.

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Acute pain

Pain that occurs suddenly and is expected to last a short duration.

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Anti-inflammatory activity

The ability of a substance to reduce inflammation.

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WHO recommendations

Guidelines provided by the World Health Organization regarding health practices.

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Acetaminophen vs NSAIDs

Acetaminophen is often a better choice than NSAIDs for musculoskeletal pain at recommended dosages.

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Complications of Acetaminophen

Acetaminophen use can lead to asthma sensitivity and complications in pregnancy.

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Cocaine as Local Anesthetic

Cocaine was the first local anesthetic discovered, known for its euphoric effects.

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Synthetic Local Anesthetics

Procaine was the first synthetic local anesthetic derived from cocaine's toxicity.

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Common Local Anesthetics

Today, lidocaine, bupivacaine, and tetracaine are the most widely used local anesthetics.

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Local Anesthetic Systemic Toxicity (LAST)

LAST is a life-threatening condition from local anesthetic administration with early signs like numbness and agitation.

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TAC Anesthetic Mixture

TAC is a historical mixture of tetracaine, epinephrine, and cocaine for local anesthesia.

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Acetaminophen Effectiveness

Relieves pain similarly to ibuprofen but not anti-inflammatory.

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NSAIDs vs Acetaminophen

NSAIDs reduce inflammation; acetaminophen does not.

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Acetaminophen Administration

Commonly administered orally in tablet or caplet form.

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Metabolism of Acetaminophen

Absorbed in the small intestine, metabolized in the liver.

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Maximum Dosage

4,000 mg/day is the safe maximum dose of acetaminophen.

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Hepatotoxicity Symptoms

Nausea, vomiting, diarrhea followed by liver damage.

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Caffeine Interaction

Caffeine can enhance the analgesic effects of acetaminophen.

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Adverse Effects

Leading cause of liver failure, often due to overdose.

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Combination Products

Many OTC meds contain acetaminophen; monitor dosages.

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Safe Dose

Recommended safe dose is 3,250 mg/day.

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Approval for Arthritis Pain

Recommended for arthritis pain but not for inflammation.

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Onset of Action

The effect of acetaminophen can take about 24 hours.

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Dosage Calculation Examples

Taking multiple sources could lead to toxicity; calculation is key.

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Overdose Consequences

High doses can lead to acute liver failure.

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Common Trade Names

Known as Tylenol in North America, Paracetamol internationally.

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Therapeutic Effects of Acetaminophen

Acetaminophen treats mild to moderate pain and reduces fever.

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Acetaminophen's Anti-Inflammatory Activity

Acetaminophen has relatively little anti-inflammatory activity compared to NSAIDs.

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WHO Recommendation for Children

WHO recommends acetaminophen for treating fever in children over 38.5°C.

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Modes of Acetaminophen Administration

Acetaminophen is commonly administered orally, with various forms available.

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Acute Pain Characteristics

Acute pain is sudden in onset and expected to last a short time.

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Biopsychosocial Model Components

The model includes biological, psychological, and social factors influencing health.

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Acetaminophen Usage Statistics

Around 50 million Americans use acetaminophen weekly for various conditions.

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Caffeine Interaction with Acetaminophen

Caffeine can enhance the analgesic effects of acetaminophen.

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Acetaminophen Complications

Complications from acetaminophen use include asthma sensitivity and issues during pregnancy.

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Local Anesthetic Action

Local anesthetics first eliminate pain, then other sensations like temperature and touch.

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Cocaine's Historical Use

Cocaine was the first local anesthetic discovered for its euphoric effects.

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Effects of TAC Mixture

TAC, a mix of tetracaine, epinephrine, and cocaine, was used historically but is now less common.

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LAST Symptoms

Local Anesthetic Systemic Toxicity (LAST) begins with numbness and confusion.

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Lidocaine Alternatives

Emla cream (lidocaine & prilocaine) is a safer alternative to cocaine in local anesthesia.

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Mechanism of Action

Acetaminophen works by inhibiting neurotransmitters in the CNS for pain relief.

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Acetaminophen and Inflammation

Acetaminophen relieves pain but does not reduce inflammation or swelling.

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Acetaminophen Routes of Administration

Available in oral, rectal, buccal, and IV forms, often taken orally.

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Acetaminophen and Alcohol

Caution is needed as heavy alcohol use increases risk of liver toxicity.

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Hepatotoxicity Risk

Taking more than 4 g/day can lead to liver damage; monitor dosages.

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Symptoms of Hepatotoxicity

Presents as nausea, vomiting, diarrhea followed by liver damage.

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Dosing Guidelines for Acetaminophen

Recommended maximum daily dose is 4,000 mg, safe dose is 3,250 mg.

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Absorption and Bioavailability

Acetaminophen is absorbed in the small intestine and metabolized in the liver.

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Acetaminophen in Sports Medicine

Often used for pain from injuries like sprains, strains, and headaches.

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Combination Medications Containing Acetaminophen

Many OTC cold medicines include acetaminophen; monitor overall dosage.

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Safe Use of Acetaminophen

Safe when used appropriately; be cautious of combining medications.

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Acetaminophen Overdose Consequences

Can lead to acute liver failure if excessive amounts are ingested.

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American College of Rheumatology Recommendations

Recommends acetaminophen for arthritis pain without inflammation issues.

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Analgesic Properties

Acetaminophen is an effective pain reliever but not anti-inflammatory.

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Biological Component

Refers to physical aspects affecting health, such as genetics and other illnesses.

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Psychological Component

Involves mental factors that can affect health and pain experience.

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Social Component

Focuses on social influences on health, like support systems and environment.

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Acetaminophen Role

Treats mild to moderate pain and reduces fever with minimal risks.

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Acetaminophen Approval

Recommended for treating fever in children above 38.5°C.

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Cocaine's Historical Role

First local anesthetic used, known for its euphoric properties.

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Cocaine Discovery

Cocaine was the first local anesthetic discovered in the late 19th century.

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Local Anesthetics Function

Local anesthetics block sensation, allowing for short-term pain relief.

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Complications of Acetaminophen Use

Asthma sensitivity and pregnancy risks include preterm birth and low birth weight.

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TAC Mixture

TAC is a historical anesthetic mixture of tetracaine, epinephrine, and cocaine.

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Safer Alternatives to Cocaine

Emla cream combines lidocaine and prilocaine for local anesthesia without cocaine's risks.

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Onset of Local Anesthetics

Local anesthetics provide pain relief by initially blocking pain sensation.

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Acetaminophen's Dual Role

Acetaminophen relieves pain and reduces fever but is not anti-inflammatory.

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Onset of Action Time

Acetaminophen effects can take up to 24 hours to occur.

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Cautions for Acetaminophen Use

Do not exceed 4,000 mg in 24 hours to avoid liver toxicity.

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Acetaminophen's Common Forms

Available as tablets, caplets, liquid, and IV forms.

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Hepatotoxicity Signs

Symptoms include nausea, vomiting, and diarrhea indicating liver damage.

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Dosage Considerations

Dosage must be calculated to prevent overdoses when using multiple products.

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Acetaminophen Addition in OTC Meds

Many cold medications contain acetaminophen; be cautious of total dosage.

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Common Brand Names

Known as Tylenol in North America, Panadol internationally.

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Absorption of Acetaminophen

Absorbed mainly in the small intestine and metabolized in the liver.

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Acetaminophen and Caffeine

Combining acetaminophen with caffeine can enhance its analgesic effect.

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Initial Symptoms of Hepatotoxicity

Initially presents with nausea, vomiting, and diarrhea after an overdose.

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Pharmacokinetics of Acetaminophen

Metabolized in the liver and excreted by the kidneys.

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Acetaminophen's Maximum Daily Dose

The maximum safe dosage for adults is 4,000 mg per day.

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Asthma Sensitivity to Acetaminophen

34% of aspirin-sensitive asthmatics show sensitivity to acetaminophen.

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Pregnancy Complications of Acetaminophen

Use during pregnancy can lead to preterm birth and low birth weight.

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First Local Anesthetic

Cocaine was the first discovered local anesthetic in the late 19th century.

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Prototype of Local Anesthetics

Procaine, a synthetic substitute for cocaine, was the first prototype.

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Emla Cream

A mixture of lidocaine and prilocaine used as a safer alternative to cocaine.

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Analgesic

A medication that relieves pain without causing loss of consciousness.

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Antipyretic

A substance that reduces fever.

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Routes of Administration

Forms of taking acetaminophen include oral, rectal, buccal, and IV.

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Hepatotoxicity

Liver damage caused by excessive acetaminophen intake.

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Maximum Daily Dose

The absolute maximum dosage of acetaminophen is 4,000 mg per day.

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Combination Medications

Many OTC medicines mix acetaminophen with other ingredients.

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Acetaminophen for Arthritis

Recommended for arthritis pain, not for inflammation.

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Pharmacokinetics

Acetaminophen is absorbed in the intestines and metabolized in the liver.

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Anesthetics (Injectable)

Medications like bupivacaine and lidocaine used for local pain relief during procedures.

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Transdermal Patch

A patch that delivers medication through the skin for localized pain relief.

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Pain Relief Mechanism

Acetaminophen relieves pain by inhibiting central nervous system neurotransmitters.

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Acetaminophen's Role in Arthritis

Recommended for mild arthritis pain relief but not for inflammation or swelling.

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Caffeine and Acetaminophen

Caffeine can enhance the pain-relieving effects of acetaminophen.

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Acetaminophen for Sports Injuries

Commonly used for pain from injuries like strains and sprains in sports medicine.

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Combination Products in OTC Meds

OTC medications often combine acetaminophen with other active ingredients.

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Analgesic vs Anti-inflammatory

Acetaminophen acts as a pain reliever but is not an anti-inflammatory.

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Dosage Types

Available in 325 mg and 500 mg strengths commonly.

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Precautions with Alcohol

Heavy alcohol use increases the risk of acetaminophen-induced hepatotoxicity.

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Cautions in Combining Medications

Monitor total acetaminophen doses in combination medications to prevent toxicity.

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Safe Maximum Dose

The safer recommended dose of acetaminophen is 3,250 mg/day.

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Acetaminophen and Asthma

34% of aspirin-sensitive asthmatics may react to acetaminophen.

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Pregnancy Risks of Acetaminophen

Acetaminophen during pregnancy can cause preterm birth or low weight babies.

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Local Anesthetic Mechanism

Local anesthetics block pain sensation first, then temperature and touch.

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Initial Local Anesthetic Discovery

Cocaine was the first local anesthetic discovered in the late 19th century.

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Procaine Prototype

Procaine was the first synthetic local anesthetic derived from cocaine.

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Bupivacaine

A local anesthetic used to block pain in specific areas.

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Lidocaine Patch

Transdermal patch delivering lidocaine to treat pain.

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Biopsychosocial Model – Psychological Component

Mental factors affecting health and pain experience.

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Acetaminophen's Antipyretic Role

Used to reduce fever across all ages safely.

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WHO Recommendation for Fever

Recommends acetaminophen for children above 38.5°C.

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Cocaine in Anesthesia

Cocaine was the first local anesthetic discovered in the late 19th century.

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Prototype Local Anesthetic

Procaine was derived from cocaine and became the first synthetic local anesthetic.

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Effects of Local Anesthetics

They first eliminate pain and then reduce sensations like temperature and touch.

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Acetaminophen Indications

Used for mild arthritis pain, headaches, and fever reduction.

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Alcohol and Acetaminophen

Heavy alcohol use increases liver toxicity risk with acetaminophen.

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Acetaminophen's Antipyretic Effect

Acetaminophen effectively reduces fever across all ages.

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Therapeutic Use of Acetaminophen

Acetaminophen treats pain but has minimal anti-inflammatory effects.

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Preterm Birth Risks

Acetaminophen use during pregnancy may lead to preterm birth and low birth weight.

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Asthma Sensitivity

34% of aspirin-sensitive asthmatics may have reactions to acetaminophen.

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Dosing Guidelines

Maximum recommended dose is 4,000 mg/day; safe dose is 3,250 mg/day.

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Indications for Use

Recommended for mild pain and fever; not anti-inflammatory.

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Safe Use Considerations

Be cautious of combining acetaminophen with other medications to prevent overdose.

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Total Daily Dose Calculation

Calculating total intake is crucial to avoid exceeding daily limits.

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Paracetamol in Other Regions

Acetaminophen is known as paracetamol in international contexts.

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Acetaminophen Risks in Pregnancy

Acetaminophen use during pregnancy can lead to complications like preterm birth and low birth weight.

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Cocaine's Initial Discovery

Cocaine was the first local anesthetic discovered in the late 19th century, found in coca leaves.

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Local Anesthetic Efficacy

Local anesthetics provide short-term pain relief before other sensations are lost.

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LAST early signs

Local Anesthetic Systemic Toxicity (LAST) often starts with symptoms like perioral numbness and confusion.

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Emla Cream Composition

Emla cream combines lidocaine and prilocaine as a safer alternative to cocaine for local anesthesia.

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Risk of Systemic Toxicity

Local anesthetic systemic toxicity (LAST) can occur with rapid absorption of anesthetics into circulation.

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Components of the Biopsychosocial Model

The model consists of biological, psychological, and social factors affecting health and illness.

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Acetaminophen Common Uses

Used for headaches, muscle aches, arthritis, backaches, toothaches, colds, and fevers.

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Adverse Effects of Acetaminophen

Leading cause of liver failure, often due to overdose.

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Combined Medications

Many OTC products contain acetaminophen; monitor dosage.

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Acetaminophen Absorption

Absorbed primarily in the small intestine and metabolized in the liver.

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Acetaminophen and Arthritis

Effective for pain relief but does not address inflammation.

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Sources of Toxicity

Acetaminophen toxicity can occur from exceeding the max dosage.

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Study Notes

Analgesics

  • Acetaminophen (Paracetamol): Used for mild to moderate pain and fever reduction. Generic and trade name variations exist (e.g., Tylenol, Panadol). International name is paracetamol. Frequently used in sports medicine for pain relief from various sports-related injuries, fever, and headaches. Maximum recommended daily dose is 4,000 mg. In 2009, 29 billion doses were sold worldwide. ~50 million Americans use it weekly. Available in various forms (OTC/Rx), including IR/ER tablets, rectal, buccal, and intravenous administrations. Common uses include headaches, muscle aches, arthritis, backaches, toothaches, colds, and fevers. A popular choice for athletic trainers treating pain and fever. Acetaminophen is an analgesic and antipyretic, with relatively little anti-inflammatory activity. Better tolerated than aspirin. Effective for mild arthritis pain, but doesn't address underlying inflammation, redness, and swelling. The American College of Rheumatology recommends it as a treatment option. Worldwide sales in 2009 were 29 billion doses. Became popular in the US in the early 1980s as a safer option for treating fever in children, eliminating the risk of Reye's Syndrome associated with aspirin.. Also works to treat moderate to severe pain in conjunction with opiates. WHO recommends use in children with temperature >38.5°C (101.3°F). Has similar effects to ibuprofen for headaches. Its anti-inflammatory activity is limited. Better tolerated than aspirin owing to anticoagulant risks. Available in 325 mg and 500 mg strengths. Caffeine can affect absorption/excretion rates..
  • Camphor, Capsaicin, Menthol: Topical counterirritants, produce a numbing sensation. Available as generic-only products and marketed under brand names like Salonpas and IcyHot.
  • Acetaminophen Dosage: Maximum daily dose is 4,000 mg to avoid hepatotoxicity (liver damage). Higher doses can cause liver damage. Consider pre-existing liver conditions, alcohol use, and nutritional status; safe dose recommended at 3,250 mg/day. May be a safer choice than NSAIDs for musculoskeletal pain. Associated with asthma and pregnancy complications (preterm birth, low birth weight, and developmental delays). Available in 325 mg and 500 mg strengths. Caffeine can affect absorption/excretion.

Anesthetics

  • Local Injectable Anesthetics: Examples include bupivacaine (Marcaine), lidocaine (Xylocaine), procaine (Novocain).
  • Topical Anesthetics: Lidocaine is available in cream form (e.g., Lidocaine patch), cream (e.g., Aspercreme, Lipoderm) and Emla cream.
  • Transdermal Patches: Lidocaine-based patches provide pain relief (e.g., Lidocaine patch).
  • Cocaine: An illicit drug used as a local anesthetic. Synthetic alternatives (e.g., procaine, lidocaine) are used today due to risks.
  • Ophthalmic Anesthetics: Tetracaine is a common local anesthetic eye drop (Pontocaine).
  • Mechanism of Action (Local Anesthetics): Block nerve impulses by affecting sodium channels. Therapeutic effects provide short-term pain relief on mucous membranes and skin. Rapid absorption following topical application increases risks of systemic toxicity.
  • Local Anesthetic Systemic Toxicity (LAST): Symptoms include confusion, agitation, and numbness.
  • Alternatives to Cocaine: Safer synthetic alternatives like Lidocaine and Prilocaine are now preferred due to cocaine's toxicity, abuse, and addictive potential.
  • Tetracaine-specific details: Shorter duration.

Biopsychosocial Model

  • The biopsychosocial model considers biological, psychological, and social factors influencing pain perception. Biological factors include injury severity, pre-existing illnesses, and genetic predispositions; psychological factors include stress levels and tolerance; social factors include support systems. The components are biological, psychological, and social.

Acute Pain

  • Acute pain is short-term and sudden in onset.

Acetaminophen (Paracetamol) - Details

  • Mechanism of Action: Inhibits neurotransmitters in the CNS, activating descending serotonergic pathways, and inhibiting the hypothalamic heat-regulating center. Analgesic effects likely involve activation of descending serotonergic pathways and other nociceptive systems. Antipyresis occurs through inhibition of the hypothalamic heat-regulating center. Relatively little anti-inflammatory activity, unlike NSAIDs.
  • Routes of Administration: Oral (tablets, caplets), rectal, buccal, intravenous. Oral route is most common in sports medicine.
  • Pharmacokinetics: Absorbed in the small intestine, metabolized in the liver, and excreted by the kidneys. Caffeine can affect absorption and excretion rates. Food does not significantly impact absorption.
  • Dosing Guidelines: Maximum recommended daily dose for acetaminophen is 4,000 mg. Safe dose recommended at 3,250 mg/day; Overdose can cause hepatotoxicity (liver damage). Available in 325 mg and 500 mg strengths.
  • Indications and Precautions: Commonly used for mild to moderate pain and fever in sports medicine. ATs should be aware of potential overdoses due to overlapping medications containing acetaminophen. Can be a better analgesic choice compared to NSAIDs for musculoskeletal pain.. Liver injury risk is a concern; hepatotoxicity linked to pre-existing liver disease, nutritional status, and alcohol use. Overdosing is a concern ; be cautious of overlapping medication doses.
  • Adverse Effects: Hepatotoxicity (liver damage) is a serious concern with overdose and heavy use. Also linked to asthma and pregnancy complications (preterm birth, low birth weight, and developmental delays).
  • Important Note: Overdosing is a significant concern, especially with multiple medications containing acetaminophen. Be cautious about overlapping doses.

Local Anesthetics - Further Details

  • Therapeutic Effects: Provide short-term pain relief on mucous membranes and skin.
  • Absorption: Rapid absorption following topical application increases systemic toxicity risk; proper administration is crucial.
  • Toxicity: Local Anesthetic Systemic Toxicity (LAST) presents with symptoms like confusion, agitation, and numbness.
  • Alternatives to Cocaine: Safer synthetic alternatives like lidocaine and prilocaine (e.g., Emla cream) now replace cocaine formulations due to cocaine's toxicity, abuse, and addiction potential, as well as banned substance concerns. Tetracaine has a shorter duration.

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