Melatonin improves sleep quality in chronic non-cancer pain patients without increasing adverse events
Moderate-certainty evidence from a network meta-analysis of 98 RCTs (28,920 participants) showed that melatonin significantly improved subjective sleep quality compared to placebo (SMD = -0.60, 95%CI: -0.98, -0.22). Unlike other pharmacological agents, melatonin was not associated with an increased risk of adverse events (OR = 0.88, 95%CI: 0.19, 3.94).
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Melatonin improves sleep quality in chronic non-cancer pain patients without increasing adverse events The current body of evidence comprises 1 study and 1 meta-analysis. EvidenceHub rates the overall confidence at 49/100 (low).
The Claim
Melatonin improves sleep quality in chronic non-cancer pain patients without increasing adverse events
This conclusion is most relevant to: Adults with chronic non-cancer pain (mean age 53.2 years, 71.2% female).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Comparative effectiveness and safety of pharmacological interventions for sleep outcomes in chronic non-cancer pain: a systematic review and network meta-analysis. (Sleep medicine reviews, 2026) —
How It Works
The proposed biological pathway:
- ▸Melatonin regulates circadian rhythm and sleep-wake cycles
- ▸May modulate pain perception through anti-inflammatory and antioxidant effects
- ▸Reduces sleep onset latency and improves sleep maintenance
- ▸Result: Improved subjective sleep quality without increased adverse events
Who Might Benefit
Evidence fit by population:
- ▸Adults with chronic non-cancer pain (mean age 53.2 years, 71.2% female)
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Limited direct comparisons between agents
- ▸Heterogeneous chronic pain populations
- ▸High proportion of trials at high risk of bias
- ▸Predominance of subjective sleep outcomes
Frequently Asked Questions
Is melatonin safe for people with chronic pain?▼
Yes, the study found melatonin was not associated with an increased risk of adverse events (OR = 0.88, 95%CI: 0.19, 3.94), unlike other sleep medications.
How much does melatonin improve sleep quality in chronic pain patients?▼
Melatonin showed a moderate improvement in sleep quality with a standardized mean difference of -0.60 compared to placebo.
What other medications were tested for sleep in chronic pain?▼
Ten agents including amitriptyline, oxycodone, gabapentin, pregabalin, and duloxetine showed improvements but with low-certainty evidence and increased adverse event risks.
Should I take melatonin instead of prescription pain medications for sleep?▼
The study suggests melatonin is a promising safe adjunctive option, but larger condition-specific trials are needed to confirm effects.
References
- 1.Chang JR, Zhang Y, Zhang Y, Lin LG, Hamoudi H, Li SX, Chan EWY, Runge N, Saueressig T, Singh H, Samartzis D, Heikkala E, Karppinen J, Traeger AC, Wong AY. “Comparative effectiveness and safety of pharmacological interventions for sleep outcomes in chronic non-cancer pain: a systematic review and network meta-analysis..” Sleep medicine reviews, 2026. PMID: 42430948 DOI: 10.1016/j.smrv.2026.102340