Cannabis Affected Sleep Architecture Differently in People With and Without Chronic Pain | Research

The takeaway

In-home EEG recordings over 339 nights revealed that cannabis use significantly altered sleep stages, but the effects differed depending on whether users had chronic pain, suggesting a complex interaction between pain, cannabis, and sleep.

Sleep medicine specialists, pain management clinicians, medical cannabis users

Cannabis effects on deep sleep and REM sleep depended on whether the person had chronic pain

What the researchers found

Cannabis use showed significant main effects on slow-wave sleep (deep sleep), total sleep time, sleep onset latency, and REM sleep. Chronic pain had a significant main effect on total sleep time. Critically, significant interactions emerged between cannabis use and chronic pain on both slow-wave sleep and REM sleep, suggesting cannabis affects sleep architecture differently depending on pain status.

Why it matters

Pain and sleep are among the top reasons people use medical cannabis, yet research has studied them in isolation. This is one of the first studies to show that cannabis effects on sleep depend on pain status, meaning findings from pain-free populations may not apply to medical cannabis users.

The numbers in context

60 adults; 339 nights; 2,273 hours of EEG data; 7 consecutive nights per participant; significant cannabis effects on SWS, TST, SOL, and REM; significant pain effect on TST; significant cannabis x pain interactions on SWS and REM

How the study worked

60 adults (50% male, 47% cannabis users, 32% with chronic pain) wore in-home EEG monitors for 7 consecutive nights each, generating 339 nights (2,273 hours) of sleep data. Mixed-model repeated-measures analysis tested main effects and interactions of cannabis use and chronic pain on five sleep metrics.

What this study cannot tell us

Observational design cannot prove causation, relatively small sample (60 participants), cannabis use was naturalistic (not controlled dosing), chronic pain self-reported without clinical verification, 7 nights may not capture full variability

How to read the evidence

Ecological valid in-home EEG design with objective sleep measurement; moderate sample size but naturalistic cannabis use limits causal inference

When this study was published

Published 2025

The bigger picture

If cannabis affects sleep differently in people with chronic pain, then clinical recommendations based on research in healthy volunteers may be misleading. Medical cannabis users need guidance specific to their condition, not extrapolated from general population studies.

Questions still open

Does cannabis improve or worsen sleep quality specifically in chronic pain patients? Which sleep stage changes are beneficial vs. harmful for pain management? Would controlled dosing studies reveal dose-dependent sleep effects?

Common questions

Does cannabis help with sleep?

It is complicated. This study found cannabis significantly affected multiple sleep stages, but the effects differed based on whether the person had chronic pain. Cannabis appeared to interact with pain-related sleep disruption in ways that cannot be captured by a simple "helps" or "hurts" answer.

How was sleep measured in this study?

Participants wore in-home EEG monitors for 7 consecutive nights, generating 339 nights and over 2,273 hours of objective brain wave data, a much more realistic setup than a single night in a sleep lab.

Read the original research

Interactions between cannabis use and chronic pain on sleep architecture: Findings from in-home EEG recordings.

Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics, e00785

View on PubMed ↗Publisher’s paper ↗

Citation

Brown, Tracy W; Filbey, Francesca M. (2025). Interactions between cannabis use and chronic pain on sleep architecture: Findings from in-home EEG recordings.. Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics, e00785. https://doi.org/10.1016/j.neurot.2025.e00785