Which of the following is beta (b2) antagonistic:: (A) Esmolol, (B) Betaxolol, (C) Butoxamine, (D) Celiprolol
Answer is C. (Butoxamine): Ref: 125-KDT (136-KDT 6th)CLASSIFICATION OF b ADRENERGIC BLOCKING AGENTSNonselectgive (b1 and b2)Cardio selective (b1)Selective (b2)a. without intrinsic sympatho mimetic activity- Propranolol, sotalol, timololMetoprololButoxamine ICI 118551Atenolol Acebutolol b. With intrinsic sympathomimetic activity- PindololBisoprolol Esmolol Betaxolol c. With additional a blocking property Labetalol, carvediololCarvedilol