what are the names of common blood pressure medications?
['amlodipine (Norvasc, Lotrel)', 'diltiazem (Cardizem CD, Cardizem SR, Dilacor XR, Tiazac)', 'felodipine (Plendil)', 'isradipine (DynaCirc, DynaCirc CR)', 'nicardipine (Cardene SR)', 'nifedipine (Adalat CC, Procardia XL)', 'nisoldipine (Sular)', 'verapamil (Calan SR, Covera HS, Isoptin SR, Verelan)']