| Alcohol | Cocaine | Cannabis | Opioids | ||||
---|---|---|---|---|---|---|---|---|
Early Abs | Late Abs | Early Abs | Late Abs | Early Abs | Late Abs | Early Abs | Late Abs | |
Sleep latency | ? | ↑ | ? | ↑ | ↑ | ? | ↑ | ↑ |
Total sleep time | ? | ↓ | ? | ↓ | ↓ | ↓ | ↓ | ↓ |
Slow wave sleep | ? | ↓ | ↓ | ↓ | ↓ | ? | ↓ | ↓ |
REM sleep | ? | ? | ? | ↓ | ↑ | ↓ | ↓ | ? |
REM latency | ? | ? | ↓ | ? | ↓ | ? | ↑ | ? |