Sleep and growth hormone secretion in alcoholics.

The effect of alcoholism on slow wave sleep (SWS) and SWS-related human growth hormone (HGH) secretion was investigated in 8 sober male alcoholics and 13 non-alcoholic controls. Sleep onset was temporally correlated with both elevated HGH levels and a high percentage of SWS in control subjects, with several specific qualifications related to age. By contrast, alcoholism was associated with a dissociation of sleep onset, SWS, and HGH elevation. The first noticeable HGH elevation in sober alcoholics often occurred several hours after sleep onset and in the absence of any SWS in the same time interval. Acute intoxication appeared to "normalize" the sleep onset-SWS linkage in alcoholics but did not influence the dissociation of HGH elevation from sleep onset and SWS.