SMLE Pharmacology MCQs: Practice Questions With Explanations
Sample SMLE MCQs from Pharmacology — the largest clearly-defined SMLE subject still without a dedicated practice post — covering antibiotics, cardiovascular drugs, and analgesics, each with the answer explained.
Pharmacology is the largest clearly-defined subject in HighYield's SMLE question bank that doesn't yet have its own dedicated practice post — after Pediatrics and Internal Medicine, which already have their own guides. Below is a sample set of Pharmacology MCQs grouped by drug class, each with the correct answer marked and explained.
Antimicrobials
1. Which class of antibiotics inhibits bacterial cell wall synthesis by binding penicillin-binding proteins?
- A) Macrolides
- B) Beta-lactams ✅
- C) Aminoglycosides
- D) Fluoroquinolones
2. Which antibiotic class carries a well-known risk of tendinopathy and QT prolongation?
- A) Macrolides
- B) Fluoroquinolones ✅
- C) Tetracyclines
- D) Aminoglycosides
Cardiovascular Drugs
3. A dry, persistent cough is a well-known side effect of which antihypertensive class?
- A) Angiotensin receptor blockers (ARBs)
- B) ACE inhibitors ✅
- C) Calcium channel blockers
- D) Thiazide diuretics
4. Which agent reverses bleeding due to warfarin overdose?
- A) Protamine sulfate
- B) Vitamin K ✅
- C) Naloxone
- D) N-acetylcysteine
Diabetes & Endocrine Drugs
5. Which oral antidiabetic class carries the highest risk of hypoglycemia?
- A) Metformin
- B) Sulfonylureas ✅
- C) DPP-4 inhibitors
- D) SGLT2 inhibitors
6. Metformin's primary mechanism of action is to:
- A) Stimulate pancreatic insulin release
- B) Decrease hepatic gluconeogenesis ✅
- C) Increase renal glucose excretion
- D) Delay carbohydrate absorption
Analgesics & Anticoagulants
7. NSAIDs increase the risk of gastric ulceration primarily by:
- A) Increasing direct acid secretion
- B) Inhibiting COX-mediated prostaglandin synthesis ✅
- C) Blocking histamine receptors
- D) Increasing gastric emptying
8. Unlike warfarin, direct oral anticoagulants such as rivaroxaban and apixaban work by directly inhibiting:
- A) Vitamin K epoxide reductase
- B) Factor Xa ✅
- C) Platelet aggregation
- D) Antithrombin III
Why Pharmacology Is Worth Isolating
Pharmacology questions cut across every clinical subject on the SMLE rather than sitting inside one specialty, which is exactly why candidates tend to under-revise it as a standalone topic — until it shows up repeatedly across Medicine, Surgery and Pediatrics vignettes alike.
Prepare with HighYield
HighYield's SMLE question bank covers Pharmacology alongside Internal Medicine, Pediatrics, General Surgery and every other domain tested, with every question explained. For the full breakdown of eligibility, syllabus weighting and scoring, see our SMLE Exam Full Guide. Your first 20 questions are free.