Drug Classes and Mechanisms Practice Questions
19 free Drug Classes and Mechanisms practice questions for the USMLE Step 1, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
19 questions
All Drug Classes and Mechanisms questions
- Q1. Which of the following drug classes lowers hepatic cholesterol synthesis by inhibiting HMG-CoA reductase?
- Q2. A drug that blocks L-type calcium channels in vascular smooth muscle to cause vasodilation belongs to which class?
- Q3. Which drug class reduces blood pressure by preventing conversion of angiotensin I to angiotensin II and increasing bradykinin levels?
- Q4. Which class of antihypertensives works by blocking angiotensin II from binding to its AT₁ receptor, without affecting bradykinin metabolism?
- Q5. Which mechanism is employed by thiazide diuretics to lower blood pressure?
- Q6. Which drug class lowers heart rate and myocardial contractility primarily by antagonizing β₁-adrenergic receptors in the heart?
- Q7. Which drug class reduces LDL cholesterol by increasing clearance of LDL via upregulated LDL receptors?
- Q8. A drug that decreases peripheral vascular resistance and lowers afterload but exerts little effect on cardiac output likely belongs to which class?
- Q9. Which antihypertensive class works by promoting sodium and water excretion leading to reduced intravascular volume?
- Q10. Which class of drugs would block α₁-adrenoceptors in vascular smooth muscle to cause vasodilation and reduce blood pressure?
- Q11. Which drug class alleviates angina by reducing myocardial oxygen demand through negative inotropic and chronotropic effects?
- Q12. Which of the following best defines ‘drug class’ in pharmacology?
- Q13. Which antihypertensive class might exacerbate hyperkalemia due to reduced aldosterone activity in kidney?
- Q14. Which drug class lowers blood pressure via direct relaxation of vascular smooth muscle rather than altering renal sodium excretion or hormonal pathways?
- Q15. A patient with hypertension and gout might avoid which diuretic class due to increased uric acid levels?
- Q16. Which antihypertensive class is most appropriate in a patient with concurrent heart failure with reduced ejection fraction (HFrEF)?
- Q17. Which drug class acts by antagonizing sympathetic β-receptors and therefore reduces renin release from the kidney?
- Q18. Which class of blood pressure medications is often first-line in elderly patients due to efficacy on systolic hypertension and low cost?
- Q19. Which antihypertensive drug class can be combined with others for additive BP lowering effects due to differing mechanisms (e.g., volume, vascular tone, neuroh…