Effects of H1‐antagonists on discriminative stimulus effects of cocaine and methamphetamine in rats
作者:
T. Suzuki,
T. Mori,
K. Takamori,
K. Onodera,
M. Misawa,
期刊:
Behavioural Pharmacology
(OVID Available online 1996)
卷期:
Volume 7,
issue 2
页码: 111-118
ISSN:0955-8810
年代: 1996
出版商: OVID
关键词: Cocaine;Drug discrimination;H1-antagonists;Methamphetamine;Rat
数据来源: OVID
摘要:
The effects of H1-antagonists, such as tripelennamine, chlorpheniramine and pyrilamine, on the discriminative stimulus effects of cocaine and methamphetamine in rats were examined. Rats were trained to discriminate between cocaine (10 mg/kg, Lp.) or methamphetamine (1.0 mg/kg, Lp.) and saline, with responses maintained under a fixed-ratio 10 (FR10) schedule of food delivery. In generalization tests, tripelennamine generalized to the discriminative stimulus effects of cocaine and methamphetamine, while chlorpheniramine only generalized to cocaine. These generalizations of tripelennamine and chlorpheniramine were attenuated by the dopamine receptor antagonist haloperidol. Furthermore, tripelennamine and chlorpheniramine, but not pyrilamine, potentiated the discriminative stimulus effects of cocaine and methamphetamine. These results suggest that some H1-antagonists possess cocaine- and/or methamphetamine-like discrminative stimulus effects which may be mediated by the dopaminergic system, and as a result the discriminative stimulus effects of cocaine and methamphetamine were potentiated by these H1-antagonists.
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