title: Caffeine-phenylethylamine combinations mimic the cocaine discriminative cue.
abstract: Twelve male Sprague-Dawley rats were trained in a two-choice, food reinforced, drug discrimination task utilizing 10 mg/kg cocaine and saline as discriminative stimuli. Subjects were tested for stimulus generalization with a wide range of cocaine doses and several dose combinations of caffeine, ephedrine, and phenylpropanolamine (CEP). Caffeine produced only partial generalization. The triple CEP combinations resulted in complete generalization at high doses. All drugs produced response rate decrements at high doses. These data clearly indicate that certain look-alike stimulant products mimic the cocaine cue. The present data parallel human self-report data regarding the similarity in subjective profiles between illicit cocaine and the legal look-alike stimulants.
authors.affiliation: Department of Psychiatry and Behavioral Sciences, University of Oklahoma Health Sciences Center, Oklahoma City 73190.
authors.forename: D V
authors.initials: DV
authors.lastname: Gauvin
authors.forename: R D
authors.initials: RD
authors.lastname: Harland
authors.forename: R C
authors.initials: RC
authors.lastname: Michaelis
authors.forename: F A
authors.initials: FA
authors.lastname: Holloway
mesh_terms: D000818:Animals; D002110:Caffeine / Q000008:administration & dosage / Q000494:pharmacology*; D003042:Cocaine / Q000494:pharmacology*; D004193:Discrimination Learning; D004305:Dose-Response Relationship, Drug; D004809:Ephedrine / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D010665:Phenylpropanolamine / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D019966:Substance-Related Disorders
chemical_list: D010665:Phenylpropanolamine; D002110:Caffeine; D004809:Ephedrine; D003042:Cocaine