Which of the following is NOT an alpha-adrenoceptor agonist?: (A) Clonidine, (B) Methyldopa, (C) Guanabenz, (D) Isoxsuprine
Answer is D. Clonidine, apraclonidine, brimonidine are selective alpha 2 agonists. Guanfacine and guanabenz are central alpha 2 agonists. Isoxsuprine is a selective beta-2- receptor agonist used to relax uterus. From medical pharmacology Padmaja 4th edition page no 101