Discriminative stimulus effect of phenylephrine.

Discriminative stimulus effect of phenylephrine.

Schechter M D

Archives internationales de pharmacodynamie et de therapie

1991

1991-02

Rats were trained to discriminate phenylephrine in a two-lever, food-motivated operant task by increasing the i.p. administered training dose from 0.8 to 2 mg/kg. Stable discrimination to 2 mg/kg phenylephrine was established and testing of 0.5-2.5 mg/kg was shown to be dose-responsive and allowed for a calculated ED50 value of 0.87 mg/kg. Administration of methoxamine (0.5-6 mg/kg), another alpha 1-adrenoceptor agonist, produced a dose-responsive generalization, whereas only the lowest (0.04 mg/kg) and highest (0.12 mg/kg) doses of the alpha

Male; Animals; Rats; Cues; Adrenergic alpha-Antagonists/pharmacology; Discrimination (Psychology)/*drug effects; Reinforcement Schedule; Phenylephrine/*pharmacology; Adrenergic alpha-Agonists/pharmacology; Dose-Response Relationship; Drug; Inbred Strains; Receptors; Generalization; Stimulus/drug effects; Adrenergic; alpha/drug effects

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