Effects of alcohol on sleep
1. During acute intoxication, alcohol produces an immediate sedative effect
2. Following these initial effects, there may be increased wakefulness, restless sleep, and vivid and anxiety-laden dreams
3. With habitual use, alcohol continues to show a short-lived sedative effect in the first half of the night, followed by sleep continuity disruption in the second half
4. During alcohol withdrawal, there is extremely disrupted sleep continuity, and an increased amount and intensity of REM sleep, associated frequently with vivid dreaming