title: Butorphanol decreases edema following carrageenan-induced paw inflammation in rats.
abstract: The objectives of this study were to evaluate the anti-inflammatory effects and possible drug interactions of butorphanol by using carrageenan-induced paw inflammation in rats. We injected the right hind footpads of 64 female Sprague-Dawley rats (approximate weight, 100 g) with 50 microL of a 0.5% solution of carrageenan. Indomethacin (0, 1, 2.5, or 5 mg/kg) was administered by gavage to each of four groups 1 h prior to carrageenan injections. Half of the animals in each group received butorphanol (2 mg/kg) subcutaneously 1 h prior to carrageenan injections. Butorphanol decreased paw inflammation following carrageenan injections with or without concurrent administration of indomethacin. No drug interaction with indomethacin was observed. In conclusion, when using butorphanol for its analgesic properties, investigators should be mindful of the drug's anti-inflammatory effects, which may interfere with the experimentation.
authors.affiliation: Faculty of Veterinary Medicine, Department of Biomedicine, University of Montreal, 3200 Sicotte, St-Hyacinthe, Quebec J2S 7C6, Canada.
authors.forename: Pascal
authors.initials: P
authors.lastname: Vachon
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Moreau
mesh_terms: D000701:Analgesics, Opioid / Q000627:therapeutic use*; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D002077:Butorphanol / Q000627:therapeutic use*; D002351:Carrageenan; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D004487:Edema / Q000139:chemically induced / Q000517:prevention & control*; D005260:Female; D005528:Foot / Q000473:pathology; D006614:Hindlimb / Q000473:pathology; D007213:Indomethacin / Q000627:therapeutic use*; D007249:Inflammation / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D000701:Analgesics, Opioid; D000894:Anti-Inflammatory Agents, Non-Steroidal; D002351:Carrageenan; D002077:Butorphanol; D007213:Indomethacin