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Can a phone app curb cannabis use in early psychosis?

NCT ID NCT07811466

Symptom relief Sponsor: Centre hospitalier de l'Université de Montréal (CHUM) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 10, 2026 · Last updated Sep 11, 2026 · Updated 1 time

Summary

Researchers are testing two mobile app-based programs, CHAMPS and iCanChange, for young adults with first-episode psychosis who use cannabis. CHAMPS targets safer use for people not looking to quit, while iCanChange supports those who want to reduce or stop. The trial compares each app plus standard early intervention services against standard services alone, measuring cannabis-related problems and frequency of use.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Two mobile app-based psychosocial programs, CHAMPS and iCanChange, built on motivational interviewing and harm reduction
What this could lead to
If the apps help, they could offer a scalable, low-cost way to support young adults with psychosis who want to manage their cannabis use, reaching people who might not get specialized addiction care.
What could go wrong
This is an early efficacy trial, so the apps may not outperform standard care. Participants self-report their cannabis use, which can be unreliable, and the results may not apply to other groups or settings.

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 550 people

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

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Apr 2031

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 to 35 years

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: CHAMPS INTERVENTION * Young adults (18-35 years) with FEP * Cannabis use ≥1 day in the past month * MPS score ≥2, * NOT seeking treatment for cannabis use disorder (CUD). * CUD diagnosis possible but not required. * With a minimum of 2 months of follow-up at an EIS clinic. I CAN CHANGE INTERVENTION * Young adults (18-35 years) with FEP and CUD (DSM-5, moderate to severe) * Seeking to reduce or cease use * With a minimum of 2 months of follow-up at an EIS clinic. Exclusion Criteria: * Pregnancy, breastfeeding, or any medical condition that, in the opinion of the psychiatrist, precludes safe participation or the ability to provide informed consent, * Any disabling, unstable, or acute mental condition that, in the opinion of the psychiatrist, precludes safe participation or the ability to provide informed consent, * Any planned extended absence (pending legal action, surgery, inpatient program) or other reason that, in the opinion of the study team, might prevent completion of the study, * Presence of a substance use disorder that, in the opinion of the psychiatrist, precludes safe participation (e.g., very unstable or severe SUD), * Currently participating in another specific cannabis use-focused intervention.

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Conditions

The condition(s) this trial relates to.

Behavior, Addictive cannabis dependence psychotic disorder Psychotic Disorders schizophreniform disorder

As listed by the trial registrant

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

Dependence addictive First episode psychosis (FEP) Psychosis Schizophreni-form disorder

How to take part

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  1. 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 ↗

  2. A doctor treating you

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More trials for these conditions

Other studies related to the condition(s) this trial covers.