this fall in blood pressure was accompanied by a marked bradycardia.2 pretreatment with intraventricular phentolamine ( 100-200 mug ) , piperoxan ( 40-200 mug ) or tolazoline ( 75-200 mug ) abolished the cardiovascular effects of intraventricular clonidine ( 20 mug ) .3 the cardiovascular effects of intraventricular clonidine ( 20 mug ) were not modified by the pretreatment with either haloperidol ( 1 mg/kg i.p . ) or desmethylimipramine ( 1 mg/kg i.p . ) .4 emesis was observed 1-2 min after the administration of either clonidine ( 5-20 mug ) or bay 1470 ( 30 mug ) .
C0428977
bradycardia
C0007226
cardiovascular