<prompt> All of the following statements about clonidine are true EXCEPTIt is an alpha adrenergic agonistIt can cause dry mouth as an adverse effectPrazosin completely antagonizes its actionIt inhibits sympathetic outflow.  <response>: Clonidine is a central sympatholytic. It is an agonist to alpha2 receptors. But prazosin is a selective alpha1 blocker selective alpha 2 blocker is yohimbine Clonidine can cause dryness of mouth, nose, and eyes due to central sympatholytic action. REF. ESSENTIALS OF MEDICAL PHARMACOLOGY K.D TRIPATHI-6th edition. Page No.545,546 