All of the following drugs reduce afterload, except:: (A) Enalapril, (B) Propranolol, (C) Hydralazine, (D) Sodium nitroprusside
Answer is B. Ref:KDT 6/e p504 Afterloadis reduced by the drugs having aerioler dilating propey. Propanolol is a non-selective beta-blocker. It can cause vasoconstriction by antagonizing beta2 mediated vasodilation. It, therefore do not decrease afterload.