Abstract
A procedure for studing intravenous drug self-administration in the cat is described. Ten cats were given 24-h access to methamphetamine reinforcement (0.04 mg/kg/inj). The subjects maintained a significantly higher response rate for drug reinforcement than for saline. The pattern of self-administration over days alternated between periods of high and low drug intake. Six additional cats were used to study the effect of dose per injection on methamphetamine self-administration under conditions of limited access. When methamphetamine was subtituted at various doses per infusion in animals maintained on cocaine reinforcement, response rate was shown to be an inverted U-shaped function of dose. These studies demonstrate that methamphetamine is a reinforcer in the cat and its patterns of intake under conditions of 24-h and limited access resemble other species.
Published Version
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