Which analgesic is not used in Acute myocardial infarction -: (A) Morphine, (B) Pentazocine, (C) Pethidine, (D) Buprenorphine
Answer is B. Ans. is 'b' i.e., Pentazocine Its use is associated with tachycardia & rise in BP is due to sympathetic stimulation. This increases cardiac work and hence is better avoided in coronary ischemia and myocardial infarction. Note - Petnidine also causes tachycardia (anticholinergic action) --> contraindicated in MI.