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Teens who quit weed for 2 months may think sharper, small study hints

NCT ID NCT07160153

Knowledge-focused Sponsor: University Hospital Pilsen Source: ClinicalTrials.gov ↗

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study looks at whether teens aged 15-18 who stop using cannabis for 8 weeks show improvements in thinking skills like memory, attention, and planning. Researchers will test 29 teens with cannabis dependence using brain games and urine tests. The goal is to see if abstinence helps the brain recover.

What this could mean

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

What this could lead to
If it works, this could show that quitting cannabis for 8 weeks improves memory, attention, and decision-making in teens.
What could go wrong
This is a very small study (29 teens) with no control group, so results may not apply to everyone. It only measures short-term changes.

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.

Participants

About 29 people

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

Started

Dec 2024

Expected to finish

Aug 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.

Who is studied

Adolescents aged 15-18 years with a diagnosis of cannabis dependence or harmful cannabis use.

Ages

15 to 18 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: * Adolescents aged 15-18 years with a diagnosis of cannabis dependence or harmful cannabis use. Exclusion Criteria: * psychiatric comorbidity - Dual diagnosis, including psychotic disorders, mood disorders, severe organic brain damage, or autism spectrum disorder, with the exception of compensated and stabilized anxiety disorder. Psychopharmacological treatment is permitted, except for antipsychotics prescribed for psychosis. * somatic comorbidity - Severe endocrine disorders such as diabetes mellitus, thyroid dysfunction, or severe cardiovascular disease. * Violation of abstinence between the first and second neuropsychological assessments, as well as severe decompensation of mental state requiring modification of established psychopharmacological treatment.

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Conditions

The condition(s) this trial relates to.

cannabis dependence cognitive disorder

As listed by the trial registrant

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

Cannabis dependence Cognitive assessment Harmful use

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

  • University Hospital Pilsen

    RECRUITING

    Pilsen, Czechia, 30100, Czechia

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