3. Pharmacology and Medication

Pharmacokinetics — Quiz

Test your understanding of pharmacokinetics with 5 practice questions.

Practice Questions

Question 1

Given a drug eliminated by saturable metabolism following Michaelis–Menten kinetics with $V_{\max}=100\ \mathrm{mg/h}$ and $K_{m}=50\ \mathrm{mg/L}$, what is the elimination rate at a plasma concentration of $100\ \mathrm{mg/L}$?

Question 2

For a drug with a low hepatic extraction ratio (E=0.2), how does a decrease in plasma protein binding affect its hepatic clearance?

Question 3

For a drug with a high hepatic extraction ratio (E>0.8), what is the expected effect of a 30% reduction in hepatic blood flow on its clearance?

Question 4

In a two‐compartment pharmacokinetic model, the initial rapid decline in plasma drug concentration primarily represents which process?

Question 5

A 60 kg patient has a volume of distribution of 0.3 L/kg and a drug bioavailability of 80%. To achieve an initial plasma concentration of 8 mg/L, what loading dose is required?