<prompt> Which of the following drug is not used for the treatment of hypeensive emergenciesPhentolamineFenoldopamSod.NitroprussideEnalapril  <response>: Enalaprilat is an active formmetabolite of enalapril, an ACE inhibitor. Enalaprilat is used for hypeensive emergencies due to the rapid onset of action. Enalapril isnt used as it 1st has to get activated.Ref: Katzung 10th ed, pg 145 