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Efficacy of Melatonin, Low-dose Quetiapine, or Placebo in Patients With Psychiatric Disorders and Comorbid Insomnia

Efficacy of Melatonin, Low-dose Quetiapine, or Placebo in Patients With Psychiatric Disorders and Comorbid Insomnia: a Randomized Clinical Trial

Status
Recruiting
Phases
Phase 2Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06062953
Acronym
MEL-QUE
Enrollment
255
Registered
2023-10-02
Start date
2023-09-18
Completion date
2029-02-28
Last updated
2025-04-24

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

Conditions

Insomnia, Psychiatric Disorders

Brief summary

The goal of this investigator-initiated, randomized, blinded, 3-armed placebo-controlled, pragmatic, clinical superiority trial is to examine the efficacy of melatonin or low-dose quetiapine versus placebo for treatment of insomnia in patients with psychiatric disorders. The aims of the study are: * To examine the efficacy of melatonin or low-dose quetiapine versus placebo for treatment of insomnia * To examine how melatonin or low-dose quetiapine affects global symptom severity, sleep quality, psychosocial functioning and subjective well-being. Participants will receive six weeks of treatment with either melatonin, quetiapine or placebo followed by a brief taper off.

Interventions

DRUGMelatonin

3-9 mg flexible dosing before bed time

DRUGQuetiapine

50-150 mg flexible dosing before bed time

DRUGPlacebo

1-3 capsules flexible dosing before bed time

Sponsors

Danish Center for Sleep Medicine
CollaboratorOTHER
Region Capital Denmark
CollaboratorOTHER
Copenhagen Trial Unit, Center for Clinical Intervention Research
CollaboratorOTHER
Mental Health Services in the Capital Region, Denmark
CollaboratorOTHER
Lone Baandrup
Lead SponsorOTHER

Study design

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

Eligibility

Sex/Gender
ALL
Age
16 Years to 64 Years
Healthy volunteers
No

Inclusion criteria

* 16 to 64 years of age * ICD-10 diagnosis of a current or previous mental or behavioral disorder (F20-F69, F84, F90-95) * For the diagnoses F84 and F90 a previous period of treatment with melatonin is required * For the 16-17 years old: Non-pharmacological treatment options including sleep hygiene education, weighted blanket or other gravity products have been tested with insufficient effect * Self-reported sleep difficulties at least three times per week in the preceding 3 months * Insomnia Severity Index score ≥11 * Women of childbearing potential: negative pregnancy test at baseline and use of highly effective contraception measures * Informed consent

Exclusion criteria

* Current treatment with melatonin or quetiapine * Severe somatic comorbidity * BMI ≥ 35 kg/m2 * Breastfeeding * Alcohol and/or substance dependency within the last 3 months * Inadequate Danish language skills * Not able to make an informed consent * Increased cardiac risk as assessed by presence of cardiac risk factors, cardiac symptoms, or prolonged QT-interval at baseline ECG

Design outcomes

Primary

MeasureTime frameDescription
Insomnia severity6 weeksInsomnia Severity Index, range 0-28, higher is worse

Secondary

MeasureTime frameDescription
Clinical global impression (CGI)6 weeksClinical global impression: Severity, range 0-7, higher is worse
Subjective sleep quality6 weeksPittsburgh Sleep Quality Index, range 0-21, higher is worse
Psychosocial functioning6 weeksPersonal and Social Performance Scale, range 1-100, higher is better
Patient-reported subjective well-being6 weeksWHO-5 well-being index, range 0-100, higher is better

Other

MeasureTime frameDescription
Objective sleep quality (polysomnography)6 weeksTotal sleep time in minutes, higher is better
Circadian rhythmicity (actigraphy)6 weeksInterdaily stability which quantifies the invariability from day to day, i.e., the predictability of the 24 h rest-activity pattern. This index will be 1 for perfect interdaily stability and thus lower values reflect higher variability between the observed days

Countries

Denmark

Contacts

Primary ContactLone Baandrup, MD
lone.baandrup@regionh.dk+4591165903

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026