title: Antagonism by piperidine of levodopa effects in Parkinson disease.
abstract: The nicotinic cholinergic amine piperidine diminished both the dyskinesia and the symptomatic control in some patients with Parkinson disease receiving levodopa. Since the piperdine configuration is contained in the molecules of the apomorphine and N-propylnoraporphine, it might be responsible for the antagonism of these drugs to some effects of levodopa in Parkinson disease and for the palliation by apomorphine of some dopamine-mediated symptoms in other extrapyramidal disorders.
mesh_terms: D000368:Aged; D055598:Chemical Phenomena; D002621:Chemistry; D004305:Dose-Response Relationship, Drug; D004341:Drug Evaluation; D004409:Dyskinesia, Drug-Induced / Q000188:drug therapy*; D005260:Female; D006801:Humans; D007980:Levodopa / Q000037:antagonists & inhibitors*; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy*; D010880:Piperidines / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D010880:Piperidines; D007980:Levodopa