Contingent drug tolerance: differential tolerance to the anticonvulsant, hypothermic, and ataxic effects of ethanol.

TitleContingent drug tolerance: differential tolerance to the anticonvulsant, hypothermic, and ataxic effects of ethanol.
Publication TypeJournal Article
Year of Publication1995
AuthorsKim CK, Pinel JP, Dalal S, Kippin TE, Kalynchuk LE, Payne GJ
JournalPharmacol Biochem Behav
Volume52
Issue3
Pagination531-9
Date Published1995 Nov
ISSN0091-3057
KeywordsAmygdala, Animals, Anticonvulsants, Ataxia, Body Temperature, Central Nervous System Depressants, Drug Tolerance, Electric Stimulation, Electrodes, Implanted, Ethanol, Kindling, Neurologic, Male, Rats
Abstract

The kindled-convulsion model of epilepsy was used to study contingent tolerance to ethanol's (1.5 g/kg; IP) anticonvulsant, hypothermic, and ataxic effects in adult male rats. In the present experiments, three groups of amygdala-kindled rats received a series of bidaily (one every 48 h) convulsive stimulations: one group received ethanol 1 h before each stimulation; one group received ethanol 1 h after each stimulation; and another group served as the saline control. Tolerance to ethanol's anticonvulsant effect (Experiments 1 and 2) was greatest in those rats that received ethanol before each convulsive stimulation; whereas, tolerance to ethanol's hypothermic (Experiments 1 and 2) and ataxic (Experiments 2) effects developed in both groups that received ethanol. These results were predicted on the basis of the drug-effect theory of drug tolerance: the theory that functional drug tolerance is an adaptation to the disruptive effects of drugs on concurrent patterns of neural activity, not to drug exposure per se.

Alternate JournalPharmacol. Biochem. Behav.
PubMed ID8545470