Central components in the antinociceptive activity of dipyrone in mice
Inflammopharmacology, vol.8, no.3, pp.259-265, 2000 (Scopus)
- Publication Type: Article / Article
- Volume: 8 Issue: 3
- Publication Date: 2000
- Doi Number: 10.1163/156856000750260504
- Journal Name: Inflammopharmacology
- Journal Indexes: Scopus
- Page Numbers: pp.259-265
- Keywords: Antinociceptive activity, Buspirone, Cyproheptadine, Dipyrone, Naloxone
- Kütahya Health Sciences University Affiliated: Yes
Abstract
Dipyrone is classified as a nonsteroidal anti-inflammatory drug. It has analgesic, antipyretic and anti-inflammatory properties and exerts its analgesic effect via both peripheral and central action. Dipyrone at the dose of 250 and 500 mg/kg showed dose-dependent antinociceptive activity in the hot plate, tail flick tests to radiant heat and tail clip test and the writhing test induced by acetic acid in mice. The antinociceptive effects of dipyrone (500 mg/kg) were antagonized by naloxone (1, 2, 5 mg/kg) in the tail flick test to radiant heat and tail clip test and hot plate tests but not in the writhing test. Cyproheptadine (100 μg/kg) decreased the antinociceptive effect of dipyrone. There was an increase in the antinociceptive effects of dipyrone (500 mg/kg) when combined with buspiron (0.5 mg/kg) in the tail flick test to radiant heat and tail clip test. The results provide evidence for a central antinociceptive effect of dipyrone antagonized by naloxone which suggests that its activity may also involve the serotoninergic system.