Why does alcohol keep you awake at night?

Alcohol can disrupt sleep patterns by affecting the body's natural circadian rhythm and altering the sleep cycle. While it may initially make you feel drowsy, it often leads to fragmented sleep and reduces the amount of restorative REM sleep. Additionally, alcohol can increase the likelihood of waking up during the night due to its diuretic effects and potential for causing snoring or sleep apnea. As a result, even if you fall asleep faster, the overall quality of sleep is compromised.