What can diltiazem hydrochloride do to your heart?

Diltiazem hydrochloride is a calcium channel blocker that helps relax and widen blood vessels, reducing heart workload and lowering blood pressure. It can slow the heart rate and improve blood flow, making it beneficial for conditions like hypertension, angina, and certain arrhythmias. By decreasing the heart's oxygen demand, it can alleviate chest pain and improve exercise tolerance. However, it may also cause side effects such as bradycardia or heart block in some patients.