Compounded Effects: Alcohol's daytime sedative and performance-disrupting effects is affected by a person's base level of sleepiness. Increased sleepiness compounds alcohol's effects, whereas increased alertness diminished alcohol's effects. Also, research suggests thatthe relationship between sleepiness/alertness and alcohol consumption may be bi-directional;in that, variations in the durations of nocturnal sleep and the level of day-time sleepiness may play an important role in modulation alcohol consumption. In other words, shorter periods of sleep time were associated with heavier drinking.
Overall, data suggest that the alcohol-sleep relation is interactive - that is, disturbed nocturnal sleep increases the likelihood of alcohol use, and alcohol has the potential to influence sleep