Calcium Channel Blockers (CCBs) (cont.)
Annette (Gbemudu) Ogbru, PharmD, MBA
Dr. Gbemudu received her B.S. in Biochemistry from Nova Southeastern University, her PharmD degree from University of Maryland, and MBA degree from University of Baltimore. She completed a one year post-doctoral fellowship with Rutgers University and Bristol Myers Squibb.
In this Article
- What are calcium channel blockers (CCBs) and how do they work?
- For what conditions are calcium channel blockers used?
- Are there any differences among calcium channel blockers?
- What are the side effects of calcium channel blockers?
- With which drugs do calcium channel blockers interact?
- What are examples of calcium channel blockers available?
For what conditions are calcium channel blockers used?
Calcium channel blockers are approved for treating:
- abnormal heart rhythms (for example, atrial fibrillation, paroxysmal supraventricular tachycardia) and subarachnoid hemorrhage.
They are also used for treating other conditions such as:
blood pressure in the pulmonary arteries (pulmonary hypertension),
phenomenon, cardiomyopathy (disease of the heart's muscle), and
- preventing migraine headaches.
Are there any differences among calcium channel blockers?
Although calcium channel blockers have a similar mechanism of action, they differ in their ability to affect heart muscle vs. arteries, and they differ in their ability to affect heart rate and contraction. These differences determine how they are used and their side effects.
- verapamil (Covera-HS, Verelan PM, Calan), and
diltiazem (Cardizem LA, Tiazac) reduce the strength and rate of the heart's
contraction and are used in treating abnormal heart rhythms; and
- amlodipine (Norvasc) has very little effect on the heart rate and contraction. Therefore, amlodipine is not used for treating abnormal heart rhythm, but it is preferred when heart failure is present and dilation of arteries is desired.
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