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Effects of CA antagonists on ethanol-induced excitation in habituated and nonhabituated mice: Interaction with stress factors?



Effects of CA antagonists on ethanol-induced excitation in habituated and nonhabituated mice: Interaction with stress factors?



Pharmacology Biochemistry and Behavior 44(4): 791-796



The effects of Ca antagonists on ethanol induced locomotion in habituated (H) and nonhabituated (NH) mice was examined. H-mice were exposed to the testing apparatus for 4 days before testing. Mice were pretreated with pimozide (D-2 antagonist), Schering 23390 (D-1 antagonist), phenoxybenzamine (alpha-1 antagonist), or yohimbine (alpha-2 antagonist). Mice were then treated with ethanol. H mice had lower activity scores compared to NH mice. Ethanol produced an increase in activity for both groups. In NH animals, pimozide attenuated excitation in inverse relation to the ethanol dosage. In H mice, pimozide attenuated excitation only at doses that in themselves produced a decrease in activity. Schering 23390 reduced excitation only at doses that affected activity per se in both groups. Phenoxybenzamine reduced excitation dose-dependently in both groups. Yohimbine decreased excitation in both groups. Results suggest that stress emanating from a novel environment may affect not only activity per se but also the interaction between CA antagonists and ethanol.

Accession: 008554579

Download citation: RISBibTeXText

PMID: 8385782

DOI: 10.1016/0091-3057(93)90007-g

Download PDF Full Text: Effects of CA antagonists on ethanol-induced excitation in habituated and nonhabituated mice: Interaction with stress factors?



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