What is a common side effect of calcium channel blockers?

Calcium channel blockers are primarily used to treat conditions such as hypertension and certain types of angina by relaxing blood vessels and reducing the heart's workload. One of the common side effects associated with calcium channel blockers is constipation. This occurs because the medications can lead to decreased gastrointestinal motility, resulting in slower movement through the intestines and thus contributing to constipation.

While dry mouth, sleepiness, and muscle cramps might be side effects associated with other medications or conditions, they are not as frequently seen with calcium channel blockers as constipation is. Therefore, understanding the pharmacological effects of calcium channel blockers helps clarify why constipation is the most relevant and common side effect linked to their use.