Behavioral sensitization to the discriminative stimulus effects of methamphetamine in rats
- PMID: 15363990
- DOI: 10.1016/j.ejphar.2004.07.064
Behavioral sensitization to the discriminative stimulus effects of methamphetamine in rats
Abstract
Sensitization to the discriminative stimulus effects of psychostimulants is not fully understood. Therefore, the present study was designed to investigate the development of sensitization to the discriminative stimulus of methamphetamine in rats. A dose-response curve for methamphetamine and a generalization test for cocaine were recorded in rats trained to discriminate between 1.0 mg/kg methamphetamine and saline. A significant leftward shift of the dose-response curve for methamphetamine and of the dose-generalization curve for cocaine was observed following repeated administration of methamphetamine (2.0 mg/kg) instead of saline. These findings suggest that repeated administration of methamphetamine can produce behavioral sensitization to the discriminative stimulus effects of methamphetamine in rats.
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