Agent of first choice in an acute attack of Prinzmetal's angina is:
Answer is B (Nitrates) "Sublingual nitroglycerine is the drug of choice" -- CMDT Nitrates decrease aeriolar and venous tone, reduce preload and afterload, and reduce the oxygen demand of the hea. Nitrates may also improve myocardial blood flow by dilating collateral channels in the presence of increased vasomotor tone, or coronary stenosis.
Diltiazem
Nitrates
Propranolol
Verapamil