What is a common side effect of beta-blockers?

• A. Dizziness and lightheadedness
• B. Bradycardia (slow heart rate)
• C. Increased perspiration
• D. Weight gain

Answer: (B)

Beta-blockers are a class of medications primarily used to manage cardiovascular conditions such as hypertension and heart failure, as well as to prevent migraines and treat anxiety. One common side effect associated with beta-blockers is bradycardia, which refers to a slower than normal heart rate. This occurs because beta-blockers work by blocking the effects of adrenaline on the beta-adrenergic receptors in the heart. As a result, the heart beats more slowly and with less force, which can effectively lower blood pressure and reduce the workload on the heart.

Bradycardia can manifest as symptoms like fatigue, dizziness, or fainting. It is essential to monitor heart rate in patients receiving beta-blockers to ensure that it does not drop to dangerously low levels, which may necessitate a dose adjustment or discontinuation of the medication.

The other options present different side effects that may not be as directly linked to the pharmacological action of beta-blockers. While dizziness and lightheadedness can occur due to various factors such as blood pressure changes, they are not as specifically associated with the drug class as bradycardia is. Increased perspiration is not a typical side effect of beta-blockers, nor is significant weight gain, which can occur with other