All of the following are vasodilators except: (A) Methyl dopa, (B) Nitroprusside, (C) Hydralazine, (D) Diazoxide
Answer is A. Methyldopa is a centrally acting alpha-agonist Hydralazine, diazoxide, and nitroprusside are vasodilators. Hydralazine, diazoxide- aeriolar dilators- potassium channel openers Nitroprusside- both aeriolar and venous dilator REF.Essentials of Medical Pharmacology-kD Tripathi 8th ed.