Question

Which is selective $\beta_1$ adrenergic antagonist?

• A. Propranolol
• B. Atenolol
• C. Nadolol
• D. Timolol

Hint:

Atenolol is selective for $\beta_1$ receptors, making it safer in patients with asthma or COPD compared to non-selective beta-blockers.

Answer 1

The Correct Option is B

Atenolol is a cardioselective beta-blocker that selectively blocks $\beta_1$ adrenergic receptors. It is used in managing hypertension and angina. The other drugs listed (propranolol, nadolol, timolol) are non-selective beta-blockers that act on both $\beta_1$ and $\beta_2$ receptors.