title: Effects of propoxyphene, ethoheptazine, and azabicyclane on schedule-controlled responding: attenuation by pentobarbital but not naloxone.
abstract: The effects of propoxyphene, ethoheptazine, and azabicyclane, alone and in combination with 1 mg/kg naloxone, were studied in pigeons responding under a multiple fixed ratio, fixed interval schedule of food presentation. Low doses of pentobarbital (3, 5.6, and 10 mg/kg) attenuated the rate-decreasing effects produced by 20 mg/kg propoxyphene, ethoheptazine, and azabicyclane. Naloxone antagonized the rate-decreasing effects produced by 10 mg/kg azabicyclane but did not antagonize the rate-decreasing effects of propoxyphene or ethoheptazine.
mesh_terms: D000701:Analgesics, Opioid / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D000818:Animals; D001381:Azepines / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D001643:Bridged Bicyclo Compounds / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D019086:Bridged Bicyclo Compounds, Heterocyclic; D001952:Bridged-Ring Compounds / Q000494:pharmacology*; D010856:Columbidae; D003216:Conditioning, Operant / Q000187:drug effects*; D011431:Dextropropoxyphene / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D010424:Pentobarbital / Q000494:pharmacology*; D012055:Reinforcement Schedule
chemical_list: D000701:Analgesics, Opioid; D001381:Azepines; D001643:Bridged Bicyclo Compounds; D019086:Bridged Bicyclo Compounds, Heterocyclic; D001952:Bridged-Ring Compounds; C000109:azabicyclane; D009270:Naloxone; C100067:ethoheptazine; D010424:Pentobarbital; D011431:Dextropropoxyphene