Actively Recruiting

Phase 2
Age: 18Years - 70Years
All Genders
ID07472075

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

Age: 18Years - 70Years
All Genders

Eligibility Criteria

Eligible

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
Not Eligible

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

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

Treatment

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

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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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