Alcohol has profoundly negative effects on your sleep. Passing out or getting drowsy due to inebriation may make you feel like it's helping, but in reality you're going to be up (not necessarily awake, but disturbed no less) every 90-minute cycle.
"When ingested by normal individuals, alcohol leads to a more rapid induction of sleep. It also increases non-REM sleep and reduces REM sleep during the first portion of the night. However, alcohol is metabolized rapidly and blood concentrations are negligible by the middle of the night for most individuals who have a few drinks prior to bedtime, often resulting in withdrawal symptoms thereafter. These may include shallow sleep and multiple awakenings, REM rebound associated with nightmares or vivid dreams, sweating, and general activation.[2,3] Therefore, although alcohol may be effective in sleep induction, it impairs sleep during the second half of the night and can lead to a reduction in overall sleep time. As a result, it can also be associated with daytime somnolence. It is of interest that alcohol's negative effects on sleep are even observed when it is ingested in the late afternoon."