Calcium channel blockers (CCBs) are a class of drugs used to treat hypertension (high blood pressure). All cells in your body need calcium. When calcium moves into the cells of the blood vessels, this causes them to narrow, or contract. Calcium channel blockers (CCBs) block some of this calcium so that the blood vessels relax and open wider, lowering the blood pressure, and causing your blood to flow more easily so your heart does not have to work as hard. 

--CCBs that should direct to the above message:

 Norvasc (amlodipine), Cleviprex (clevidipine), Cardizem (diltiazem) Plendil (felodipine), Dynacirc (isradipine), Adalat (nifedipine), Procardia (nifedipine), Cardene (nicardipine), Nimotop (nimodipine), Sular (nisoldipine), Calan (verapamil HCl)