Calcium channel blockers (CCBs) are a group of medicines commonly prescribed to treat conditions of the heart and blood vessels, such as high blood pressure (hypertension), chest pain (angina), and abnormal heart rhythms (eg, atrial fibrillation).
Calcium channel blockers may also be used to treat Raynaud’s syndrome, a condition that causes painful and cold fingers and toes due to narrowing of the blood vessels in your hands and feet.
Calcium-channel blockers affect the way calcium passes into certain muscle cells causing these muscle cells to relax which in turn widens your blood vessels. This helps to:
- lower blood pressure
- reduce chest pain
- treat abnormal heart rhythms
- reduce your risk of stroke.