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Melatonin Versus Placebo for Bipolar Disorder

Melatonin Versus Placebo for Bipolar Disorder - a Double Blinded Randomised Controlled Trial

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07472075
Acronym
M-bipolar RCT
Enrollment
200
Registered
2026-03-16
Start date
2026-05-08
Completion date
2028-06-01
Last updated
2026-05-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Bipolar Affective Disorder

Keywords

Melatonin, Bipolar disorder, Mental disorders, Bipolar and related disorders, Mood disorder

Brief summary

The objective with this study is to conduct a 6-month RCT comparing effects of add-on melatonin versus add-on placebo on mood stabilisation and other critical patient outcomes in patients with BD and to test whether principal effects are antimanic, antidepressant and/or prophylactic against relapse

Detailed description

Sleep abnormalities are common in all phases of bipolar disorder (BD) and constitute core symptoms of both depression and mania also during remitted phases and despite treatment. Melatonin is a key circadian hormone, that expresses a robust circadian rhythm and acts as an important endogenous modulator of the circadian timing system of sleep and may thus improve sleep and stabilize BD per se. Nevertheless, sleep in general and melatonin specifically is critically understudied in BD reflecting a central key knowledge gap within psychiatry. The investigators want in a 6-month randomized placebo-controlled trial (RCT) to compare effects of add on melatonin versus add on placebo on mood stabilisation and other critical patient outcomes in patients with BD.

Interventions

DRUGMelatonin

Oral: Melatonin capsule 6 mg, 1 capsule/day

DRUGPlacebo

Oral Placebo capsule, 1 capsule/day

Sponsors

Lars Vedel Kessing
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Intervention model description

Double-blinded randomized placebo-controlled trial

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

* Bipolar disorder with diagnosis confirmed by SCAN interview * Age 18 - 70 years * The participants must be able to read and understand the participant information in their native language and consent (English and Danish) * Habile (i.e able to give informed consent)

Exclusion criteria

* Past intolerance to melatonin (allergic reactions) * Impaired renal or hepatic function (defined by GFR \<60 ml/min and/or ALAT over allowed reference value) * Women who are pregnant, breastfeeding or planning pregnancy in near future.

Design outcomes

Primary

MeasureTime frameDescription
Mood stabilization6 monthsMood stabilization will be measured by a mood instability score reflecting the daily variability in self-monitored mood collected via the Monsenso system. Patients score their daily mood on a 9-point scale (-3 to +3); scores between -0.5 to 0.5 reflect normal variations, whereas scores of +1, +2 or +3 correspond to mildly, moderately, and severely increased mood and scores of -1, -2 or -3 correspond to mildly, moderately, and severely decreased mood. According to our established methodology, for each participant, we will estimate a mood instability score. Estimates of instability will be based on reading obtained via the Monsenso system which will prompt patients to complete daily mood ratings.

Secondary

MeasureTime frameDescription
Sleep6 monthsChange in sleep measured by change from baseline on the Pittsburgh Sleep Quality Index (min. value = 0; max. value = 21 with higher scores indicating poorer sleep quality) on 3 months visit and 6 months visit
DepressionChanges between baseline, 3 months and 6 monthsThe clinical rating of depression is assessed using the Hamilton Rating Scale for Depression, 6 items (HAM-D6), (min. value=0; max. value = 22 with higher scores reflecting more severe depression )

Countries

Denmark

Contacts

CONTACTLars Kessing
lars.vedel.kessing@regionh.dk+45 38647081
PRINCIPAL_INVESTIGATORLars Kessing

University hospital Bispebjerg and Frederiksberg Hospital

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 13, 2026