<prompt> Drug of choice for classical angina attack -CCBsP-blockerGTNPrazocin  <response>: Ans. is c i.e., GTN PHARMACOLQG1CALTREATMENT OF STABLE CLASSICAL ANGINAo For immediate pre-cxcrtional prophylaxis and acute attack1. Sublingual glyceral trinitrate Drug of choiceo Acts by decreasing preload LV filling pressure - i myocardial oxygen demand,o Also cause redistribution of blood flow to the ischemic zone by dilating conducting coronary vessels.Nifedipine by bite capsuleo Decrease myocardial oxygen demand by decreasing contractility and arterial pressure,o Also dilates coronary artery.o For long term prophylaxisb-blockers DOCo They reduces the myocardial oxygen demand by inhibiting the increase in heart rate, arterial pressure and myocardial contractility caused by adrenergic stimulation.CCBso Are used if coronary spasm is suspected or 3-blockers are contraindicated.Long acting nitrateso Usually avoided because of development of tolerance.Nicorandil Potassium-channel openero Decreases preload venodilatation and L.V. filling pressure - i myocardial oxygen demand.ACE inhibitorso Particularly useful in patient at increased risk, especially if DM or LV dysfunction is present, and in those who have not achieved adequate control of blood pressure by b-blockers. 