The Study
The Effectiveness of Melatonin for Sleep Disturbances in Parkinson' Disease: Systematic Review and Meta‐Analysis
This study combines results from several experiments to see if melatonin helps sleep in people with Parkinson's disease. It shows that melatonin is linked to better sleep scores, but the improvement might not be big enough to actually change how patients feel day-to-day. We can't say for sure it causes the improvement because we only have a short summary, not the full details of the original experiments.
Analysis score
Maximum 100 for a systematic review with meta-analysis.
Where the score came from
Researchers combined data from multiple studies to see if melatonin helps people with Parkinson's disease sleep better. They found it does help patients feel more rested and fall asleep faster, but the actual improvement might be too small to notice in daily life.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 547 / 100
Quality score
The highest quality evidence. Systematic reviews and meta-analyses that pool randomized controlled trials, giving the most reliable summary of experimental evidence.
Key takeaways
Summary
Based on the study abstract and findings.
- 1While the statistical improvements are real, they may not be large enough to make a noticeable difference in a patient's daily routine or quality of life.
- 2Patients taking melatonin reported better sleep quality and less daytime sleepiness.
- 3They also fell asleep about 9.7 minutes faster and slept longer overall, though these gains were adjusted for differences between studies.
- 4Melatonin did not change other sleep measurements or reduce dream-enacting behaviors.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of Sleep Research
Year
2025
Authors
Obai Yousef, M. Abouelmagd, Hala Khaddam, Abdulrahman Shbani, Raneem Yousef, M. Meshref, Ibrahem Hanafi
Related Content
Claims (5)
Taking melatonin for a short time can help you fall asleep faster and sleep for a longer period, but experts aren't sure if these improvements are actually noticeable or important in everyday life.
Taking melatonin doesn't change most sleep measurements for people with Parkinson's disease, but it might help them fall asleep faster and sleep for a longer total time. It doesn't, however, change the deeper stages or structure of their sleep.
Taking melatonin supplements does not appear to help reduce the frequency or intensity of sleep-related acting out behaviors in people who have Parkinson's disease. If you or a loved one has this condition, melatonin is unlikely to make the dream-enacting symptoms like sleepwalking or talking during sleep any better.
Taking melatonin might make sleep scores look slightly better on paper for Parkinson's patients, but the actual improvement is too small to make a real difference in how they feel or function day-to-day.
Taking melatonin helps people with Parkinson's disease sleep better and feel less sleepy during the day. It reduces their insomnia symptoms and helps them feel more rested compared to not taking it.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.