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A Procedure to Observe Context-induced Renewal of Pavlovian-conditioned Alcohol-seeking Behavior in Rats

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Caffeine promotes an ethanol-induced conditioned taste aversion: a dose-dependent interaction.

D Kunin¹, R T Bloch, Y Terada

¹Department of Psychology, Center for Studies in Behavioral Neurobiology, Concordia University, Montreal, Quebec, Canada. kunin@csbn.concordia.ca

Experimental and Clinical Psychopharmacology

|September 6, 2001

Summary

Caffeine intake may promote alcohol-induced conditioned taste aversion (CTA) at lower alcohol doses, not block it. This effect, observed with caffeine and alcohol, suggests caffeine enhances alcohol

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Area of Science:

Neuroscience
Pharmacology
Behavioral Science

Background:

Ethanol consumption is a public health concern.
Caffeine is a widely consumed psychoactive stimulant.
Previous research indicates caffeine can influence ethanol intake.

Purpose of the Study:

To investigate the effect of caffeine on ethanol-induced conditioned taste aversion (CTA).
To determine if caffeine alters ethanol metabolism or blood ethanol levels.
To explore the interaction between caffeine and ethanol in a CTA paradigm.

Main Methods:

Administered varying doses of caffeine (2.5 and 10 mg/kg) and ethanol (1.0 and 1.5 g/kg) to subjects.
Assessed the development of ethanol-induced CTA.
Measured blood ethanol levels to control for metabolic effects.

Main Results:

Caffeine (2.5 and 10 mg/kg) promoted ethanol-induced CTA at a low ethanol dose (1.0 g/kg).
Caffeine did not block CTA at a higher ethanol dose (1.5 g/kg).
Caffeine did not alter blood ethanol levels at the tested doses.

Conclusions:

Caffeine interacts with ethanol in a dose-dependent manner regarding CTA.
Caffeine may enhance the reinforcing effects of ethanol rather than attenuate its aversive properties.
Findings support the reward comparison hypothesis in the context of caffeine-ethanol interactions.