Diltiazem has been shown to increase exercise ... In a double-blind study, Cardizem CD 180 mg once daily was compared to placebo in patients who were taking long-acting nitrates and/or beta ...
amlodipine 5 mg, or diltiazem CD 180 mg. Sublingual nitrates were used as needed. The effects of ranolazine on angina frequency and nitroglycerin use are shown here.