Light therapy may ease cocaine withdrawal and cut relapse
NCT ID NCT07545798
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.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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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
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About 256 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Sep 2025
- Expected to finish
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Dec 2029
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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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.
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.
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The places running it
1 site. The list below names each one and where it is.
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The official record
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A doctor treating you
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Contacts and locations
Locations
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Centre Hospitalier Le Vinatier
RECRUITINGBron, Auvergne-Rhône-Alpes, 69678 cedex, France
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