Pharmacology All of the following statements about clonidine are true EXCEPT: A It is an α–adrenergic agonist B It can cause dry mouth as an adverse effect C Prazosin completely antagonizes it's action D It inhibits sympathetic outflow. 💡 Explanation All of the following statements about clonidine are true EXCEPT: ✓ Correct Answer: C. Prazosin completely antagonizes it's action