title: Naloxone partly counteracts apomorphine side effects.
abstract: The effects of naloxone on side effects provoked by apomorphine (APO) administration in patients with parkinsonian syndrome have been studied. The group under study included eight patients with Parkinson's disease and four with parkinsonism who received 100 micrograms/kg s.c. APO acutely to test dopaminergic responsiveness. All patients were treated with 20 mg domperidone tablets t.i.d. and then for 2 consecutive days (in double blind fashion) were given a 2-hour i.v. saline infusion alone or with naloxone (8 mg) starting 30 min before APO administration. In both groups, naloxone delayed the appearance of sleepiness, and reduced the intensity of yawning, sleepiness, nausea, and vomiting as compared with saline. These findings indicate a potential usefulness of naloxone and other opioid antagonists in preventing acute APO side effects.
authors.affiliation: Institute of Neurology, University of Pisa, Italy.
authors.forename: U
authors.initials: U
authors.lastname: Bonuccelli
authors.forename: P
authors.initials: P
authors.lastname: Piccini
authors.forename: P
authors.initials: P
authors.lastname: Del Dotto
authors.forename: G
authors.initials: G
authors.lastname: Rossi
authors.forename: G U
authors.initials: GU
authors.lastname: Corsini
authors.forename: A
authors.initials: A
authors.lastname: Muratorio
mesh_terms: D001058:Apomorphine / Q000009:adverse effects* / Q000627:therapeutic use; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D009325:Nausea / Q000517:prevention & control; D010300:Parkinson Disease / Q000188:drug therapy; D012894:Sleep Stages / Q000187:drug effects; D014839:Vomiting / Q000517:prevention & control; D015000:Yawning / Q000187:drug effects
chemical_list: D009270:Naloxone; D001058:Apomorphine