Actively Recruiting
Melatonin Versus Placebo for Bipolar Disorder - a Double Blinded Randomised Controlled Trial
Led by Lars Vedel Kessing · Updated on 2026-05-12
200
Participants Needed
1
Research Sites
N/A
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are studying bipolar disorder, focusing on how adding melatonin compares to a placebo in helping stabilize mood and improve important patient outcomes. This randomized controlled trial aims to evaluate whether melatonin has antimanic, antidepressant, or relapse-preventing effects over six months. Sleep problems are common in bipolar disorder and affect mood phases, so this study explores melatonin's potential role as a key hormone regulating sleep and circadian rhythms. The study involves two groups of patients with bipolar disorder. One group will receive 6 mg of melatonin each evening, while the other group will receive a placebo capsule. Both patients and researchers will be unaware of which treatment each participant receives, ensuring a double-blind setup. The trial will last for six months, during which the effects on mood stabilization and other outcomes will be examined. Participants will undergo assessments throughout the six months to track mood stabilization, sleep quality, and changes in depression symptoms. Researchers will use interviews and clinical evaluations to measure these outcomes at baseline, three months, and six months. The study includes safety monitoring and informed consent, with all care and medication provided as part of the trial process.
CONDITIONS
Brief Title
Melatonin Versus Placebo for Bipolar Disorder
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Bipolar disorder with diagnosis confirmed by SCAN interview
- Age 18 - 70 years
- Ability to read and understand participant information in English or Danish
- Able to provide informed consent
You will not qualify if you...
- Past intolerance to melatonin or allergic reactions
- Impaired kidney function (GFR <60 ml/min) or liver function (ALAT over allowed reference value)
- Women who are pregnant, breastfeeding, or planning pregnancy in the near future
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
Duration - 6 months
Participants take either melatonin or placebo capsules daily to assess effects on mood stabilization and sleep.
Visits at baseline, 3 months, and 6 months
Trial Site Locations
Total: 1 location
1
Mental Health Center Copenhagen, Copenhagen Affective Research Center (CADIC)
Frederiksberg, Denmark, 2000
Actively Recruiting
Research Team
L
Lars Kessing
How is the study designed?
Study Type
INTERVENTIONAL
Masking
QUADRUPLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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