Calcium channel blockers: verapamil and nifedipine.
D000787:Angina Pectoris / Q000188:drug therapy; D003329:Coronary Vasospasm / Q000188:drug therapy; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007473:Ion Channels / Q000187:drug effects*; D009543:Nifedipine / Q000494:pharmacology*; D011725:Pyridines / Q000494:pharmacology*; D014700:Verapamil / Q000494:pharmacology*
D007473:Ion Channels; D011725:Pyridines; D014700:Verapamil; D009543:Nifedipine