Facilitation of vagal reflex bradycardia by an action of clonidine on central  -receptors.
D000109:Acetylcholine / Q000494:pharmacology; D000319:Adrenergic beta-Antagonists / Q000494:pharmacology; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D001919:Bradycardia / Q000139:chemically induced*; D002531:Cerebellum / Q000187:drug effects; D002746:Chlorpromazine / Q000494:pharmacology; D003000:Clonidine / Q000494:pharmacology*; D004285:Dogs; D004562:Electrocardiography; D005260:Female; D006145:Guanethidine / Q000494:pharmacology; D006220:Haloperidol / Q000494:pharmacology; D006339:Heart Rate / Q000187:drug effects; D008297:Male; D010643:Phenoxybenzamine / Q000494:pharmacology; D010646:Phentolamine / Q000494:pharmacology; D011941:Receptors, Adrenergic / Q000187:drug effects*; D013997:Time Factors; D014630:Vagus Nerve / Q000502:physiology*
D000319:Adrenergic beta-Antagonists; D011941:Receptors, Adrenergic; D010643:Phenoxybenzamine; D006220:Haloperidol; D003000:Clonidine; D000109:Acetylcholine; D002746:Chlorpromazine; D010646:Phentolamine; D006145:Guanethidine