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Interactions between toluene and alcohol.

G T Pryor, R A Howd, E T Uyeno

    Pharmacology, Biochemistry, and Behavior
    |September 1, 1985
    PubMed
    Summary
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    Combined exposure to toluene and alcohol in rats led to increased alcohol preference and exacerbated weight loss and organ toxicity. Toluene also caused hearing loss, potentially worsened by alcohol consumption.

    Area of Science:

    • Toxicology
    • Neuroscience
    • Pharmacology

    Background:

    • Toluene is an industrial solvent with known neurotoxic effects.
    • Alcohol consumption is a widespread behavior with significant health implications.
    • Interactions between environmental toxins and substance use are not fully understood.

    Purpose of the Study:

    • To investigate the combined effects of toluene inhalation and alcohol consumption on rat behavior and physiology.
    • To determine if co-exposure alters alcohol preference or exacerbates toluene-induced toxicity.
    • To assess the impact on weight gain, organ toxicity, and hearing function.

    Main Methods:

    • Weanling male Fischer-344 rats were exposed to toluene via inhalation for 2 weeks.
    • Subgroups received either water or 6% alcohol as their sole fluid source.

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  • Behavioral tests (two-bottle choice) assessed alcohol preference.
  • Physiological measures included weight gain, clinical blood chemistries, and auditory function (conditioned avoidance).

    • Main Results:

    • Rats exposed to both toluene and alcohol exhibited a strong preference for alcohol that persisted.
    • Co-exposure resulted in greater weight gain inhibition and signs of organ toxicity compared to single exposures.
    • Toluene exposure induced significant hearing loss, with a trend towards enhancement by alcohol consumption.

    Conclusions:

    • Combined exposure to toluene and alcohol significantly increases alcohol preference and potentiates adverse physiological effects.
    • Toluene-induced ototoxicity may be exacerbated by concurrent alcohol consumption.
    • These findings highlight the complex interactions between environmental toxins and substance use.