Which of the following is an expected side effect of calcium channel blockers?

Calcium channel blockers are primarily used to treat conditions like hypertension and angina by inhibiting calcium ions from entering cells of the heart and blood vessel walls, which leads to a relaxing effect on both the cardiac and vascular smooth muscles. This action can result in a decrease in heart rate, a condition known as bradycardia. By reducing the contraction strength and frequency of the heart, calcium channel blockers can lead to a slower heart rate, which is a recognized side effect of this class of medications.

Other potential side effects of calcium channel blockers include peripheral edema and constipation, but bradycardia is particularly noted due to their impact on the conduction system of the heart. It’s important to monitor patients for this side effect, especially in those who are taking these medications alongside others that may also lower heart rate.