Sleep architecture
Acute effect (same night as use)
- REM suppressed immediately after cocaine use
- REM latency ↑, total REM time ↓
- Insomnia from residual CNS stimulation (6–24 h window)
Withdrawal/abstinence effect
- REM rebound — ↑ REM time, ↓ REM latency, multiple SOREMPs (sleep-onset REM periods)
- Most pronounced first 2 weeks of abstinence
- SOREMPs are a hallmark of early abstinence sleep architecture
Chronic users during abstinence
- Impaired slow wave sleep (N3) — shortened N3, diminished REM over weeks
- Shortened total sleep time
- “Occult” sleep disruption: self-reported sleep quality paradoxically improves while objective PSG metrics worsen — users don’t accurately perceive their sleep architecture damage. This means wearable sleep data may contradict subjective sleep quality reports in chronic users.
- Cocaine/alcohol dependence: age-accelerated loss of stage 3 (slow wave) sleep vs age-matched controls
Mechanism
- Cocaine insomnia driven by catecholamine/serotonergic excess
- REM suppression during use: acute monoamine surge suppresses REM-promoting regions
- REM rebound during withdrawal: homeostatic compensation for acute suppression + D2R downregulation altering monoaminergic REM regulation
- CRF (corticotropin-releasing factor) from HPA axis activation contributes to arousal/insomnia
Detection implication
- Acute same-night REM suppression is a primary Cocaine detection model feature
- REM rebound during abstinence can look like use if the model doesn’t distinguish between intoxication and withdrawal states
- Occult disruption in chronic users: subjective sleep quality reports unreliable
Related
Cocaine, Cocaine crash, Cardiovascular signatures, Cocaine detection model