The effects of alcohol on the cardiovascular stress response in men at high risk for alcoholism: a dose response study.

Men at risk for alcoholism appear to be cardiovascularly hyperreactive to stressors; high doses of alcohol have been found to significantly dampen this hyperreactivity. The present study examined the effects of various doses of alcohol on cardiovascular reactivity in high- versus low-risk men. Cardiovascular reactivity to a stressor (unavoidable shock) was examined in men with multigenerational family histories of alcoholism and in family history negative men while they were sober and after they had consumed one of five alcohol doses (active placebo, 0.50, 0.75, 1.00 or 1.32 ml 95% USP alcohol/kg body weight). No significant placebo effects were observed in the active placebo condition. Furthermore, the cardiovascular reactivity dampening effect in high-risk men was evident only at moderate to high doses of alcohol, suggesting that men at high risk for the development of alcoholism must consume moderately high doses of alcohol in order to obtain this potentially reinforcing consequence.

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