Therapeutics and Evidence-Based Medicine
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Questions and Answers

What is one of the steps involved in Evidence-based Medicine (EBM)?

  • Applying evidence without evaluation
  • Ignoring clinical expertise
  • Performing a critical appraisal of the literature (correct)
  • Writing a research proposal

Which type of evidence includes interpretation of original research in EBM?

  • Tertiary evidence
  • Secondary evidence (correct)
  • Primary evidence
  • Quaternary evidence

What is meant by 'Right time' in the context of therapeutics?

  • Randomly selecting a time for drug administration
  • When the patient requests the medication
  • Administering the drug at the most beneficial time for the patient (correct)
  • When the doctor has free time

What is the role of 'clinical expertise' in Evidence-based Medicine (EBM)?

<p>Serving as a key component for decision-making along with research evidence (A)</p> Signup and view all the answers

Which type of evidence in EBM uses secondary evidence to make clinical recommendations?

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

What is the therapeutic range for Theophylline?

<p>5-10 ml (B)</p> Signup and view all the answers

Why does Midazolam have a rapid onset of action?

<p>It is a lipophilic benzodiazepine (D)</p> Signup and view all the answers

What will happen after 12 hours with the pharmacokinetics of Theophylline?

<p>The drug stops working (A)</p> Signup and view all the answers

Which factor influences the distribution of unbound Midazolam to various tissues in the body?

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

Why do older people need only half the dose of Midazolam compared to younger people?

<p>Because they have different EC50 values (A)</p> Signup and view all the answers

What characteristic of certain medicines makes them dosed at the top of the concentration-effect curve?

<p>Possessing a flat concentration-effect relationship (C)</p> Signup and view all the answers

What is the measure of the affinity of a drug at the receptor?

<p>EC50 (A)</p> Signup and view all the answers

Which route of administration leads to the most rapid onset of systemic pharmacological action?

<p>Inhalation delivery to the ear (B)</p> Signup and view all the answers

Why does the dose of Enalapril need to be reduced in people with renal impairment?

<p>Enalapril's active metabolite is predominantly renally excreted. (A)</p> Signup and view all the answers

Which type of drug blocks receptor sites and inhibits cellular activity?

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

What does the concentration effect relationship denote?

<p>Therapeutic range/safety margin (B)</p> Signup and view all the answers

Which molecule acts as messengers inside a cell when a drug interacts with a cell surface receptor?

<p>G-proteins (D)</p> Signup and view all the answers

What happens when a drug interacts with a cell surface receptor?

<p>It activates second messengers to initiate intracellular pathways. (C)</p> Signup and view all the answers

"Mechanism of action" in pharmacodynamics refers to:

<p>Agonists, antagonists, modifiers and modulators. (C)</p> Signup and view all the answers

What is the role of second messengers when a drug activates a cell surface receptor?

<p>Initiate cascade of reactions within the cell. (C)</p> Signup and view all the answers

What is the main focus of Pharmacodynamics?

<p>What the drug does to the body. (B)</p> Signup and view all the answers

What type of study design starts with the outcome and works backwards?

<p>Case-control design (D)</p> Signup and view all the answers

Which characteristic describes systematic reviews?

<p>Summaries of clinical trials (A)</p> Signup and view all the answers

What is the major disadvantage of randomized controlled trials (RCTs) mentioned in the text?

<p>Expensive and time-consuming (A)</p> Signup and view all the answers

In pharmacoepidemiology, what population groups may be studied for unique drug therapy needs?

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

Which study type is used to describe the frequency and occurrence of diseases or conditions?

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

What does pharmacoepidemiology primarily study?

<p>Drug effects in large numbers of people (B)</p> Signup and view all the answers

What is the main advantage of blinding in randomized controlled trials (RCTs)?

<p>Unbiased distribution of risk factors (C)</p> Signup and view all the answers

What is a potential issue with cross-sectional analytical studies according to the text?

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

What type of information is not typically available from pre-market studies according to the text?

<p>Real-world drug use insights. (D)</p> Signup and view all the answers

What type of population is used in cohort research design studies?

<p>People without disease. (D)</p> Signup and view all the answers

What determines the choice of drug administration route according to the text?

<p>Time to onset of effect (C)</p> Signup and view all the answers

Which route of drug administration allows for the drug to be rapidly absorbed through a mucous membrane with no first-pass metabolism?

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

What is the primary function of first-pass metabolism in drug delivery?

<p>Reduce bioavailability by metabolizing the drug before it reaches systemic circulation (D)</p> Signup and view all the answers

Which drug characteristic makes enalapril unique based on the provided text?

<p>Active metabolite has pharmacological action, unlike the parent drug (B)</p> Signup and view all the answers

Which parameter describes the efficiency of drug elimination from the body, based on pharmacokinetics?

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

What determines the loading dose of a drug according to pharmacokinetics?

<p>Volume of distribution (B)</p> Signup and view all the answers

In which pathway are drugs generally oxidated to make them more water-soluble before elimination?

<p>Phase 1 pathway (A)</p> Signup and view all the answers

What is the primary function of conjugation in drug metabolism?

<p>Make metabolites less water-soluble for excretion (C)</p> Signup and view all the answers

Which route of administration results in complete absorption, no first-pass metabolism, and rapid effects?

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

What parameter describes how long a drug or its metabolite stays in the body?

<p>Half-life (B)</p> Signup and view all the answers

What is the formula to calculate the incidence in the exposed group?

<p>a/(a+b) (D)</p> Signup and view all the answers

Which pharmacokinetic process involves the movement of drugs from the bloodstream to various tissues and organs?

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

What is the plato point in pharmacokinetics characterized by?

<p>No additional gain/benefit with dose increase (C)</p> Signup and view all the answers

How is the concentration of a drug at the effect/target site affected by its physicochemical properties?

<p>Increased concentration with lipophilic compounds (B)</p> Signup and view all the answers

In pharmacokinetics, what process involves drug metabolism primarily occurring in the liver to produce more water-soluble metabolites?

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

What is the correct interpretation of Odds Ratio (OR) calculation?

<p>Relative risk between exposed and unexposed groups (A)</p> Signup and view all the answers

Which group experienced a higher incidence of headaches in the given scenario?

<p>Users of Drug X (B)</p> Signup and view all the answers

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