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Light therapy may ease cocaine withdrawal and cut relapse

NCT ID NCT07545798

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether bright light therapy can help people going through cocaine withdrawal in a hospital. Cocaine withdrawal often disrupts sleep, mood, and daily rhythms, making it hard to stay drug-free. The therapy uses a special lamp to mimic daylight, which may improve sleep, mood, and reduce the urge to use cocaine again. Researchers will track 256 adults over one month to see if light therapy leads to more cocaine-free days and fewer relapses.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 256 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2025

Expected to finish

Dec 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Male or female, 18 years of age or older * DSM-5 criteria for cocaine use disorder * Positive urine screen for cocaine * Hospitalization for supervised cocaine detoxification planned within the four upcoming weeks * The patients must be insured or beneficiary of a health insurance plan * Signed and dated informed consent document(s) indicating that the subject has been informed of all pertinent aspects of the trial Exclusion Criteria: * Non-stabilized opioid use disorder or other psychostimulant use disorder (e.g., amphetamine, met-amphetamine, cathinones, methylphenidate…) * Non-stabilized psychiatric disorder or somatic disease, which is considered incompatible with inclusion by the investigator * Current treatment with methylphenidate, modafinil, solriamfetol, melatonin pitolisant, naltrexone, or bupropion. * Contraindication to light therapy: retinopathy, pigmentary retinitis, diabetic retinopathy, macular degeneration, glaucoma, recent (i.e., less than three month) eye surgery. (If there is any doubt about an ophthalmological contraindication, a specialist opinion will be requested) * Tutorship * Pregnant or breastfeeding women: the performance of a pregnancy test before inclusion for women of childbearing age * Persons deprived of their liberty by a judicial or administrative decision * Persons participating in other research with an exclusion period still in progress at pre-inclusion

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Conditions

The condition(s) this trial relates to.

cocaine dependence Cocaine-Related Disorders

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Centre Hospitalier Le Vinatier

    RECRUITING

    Bron, Auvergne-Rhône-Alpes, 69678 cedex, France

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