Pharmacology · single question
What is the mechanism of action of atenolol?
Show answer and explanation
Correct answer: B. Selective beta-1 (cardioselective) blocker
- A. Non-selective beta-blockade describes propranolol, not atenolol.
- B. Correct. Atenolol is a selective beta-1 antagonist that lowers heart rate and cardiac output.
- C. Alpha-1 blockers (e.g., prazosin) act differently.
- D. Atenolol does not block calcium channels.