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High confusion: study tests THC isolates on driving skills

NCT ID NCT06236815

Knowledge-focused Sponsor: University of Wisconsin, Madison 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 early-phase study with 5 adults looked at how two cannabis compounds (delta-9-THC and delta-8-THC) affect driving ability. Participants took the compounds and then used a driving simulator and field sobriety tests. The goal was to see if it's possible to measure impairment and drug levels in the body. This was a small feasibility study, not a treatment trial.

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

Early phase 1

The earliest testing in people: a first look at safety, in a very small group.

Participants

5 people

The number who actually took part.

Started

Jan 2025

Finished

Sep 2025

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 49 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * At least 18 years of age, no older than 49 years of age * Recent cannabis use (within past two years) * Good mental health as determined by self-reported responses to the Psychopathology Screener * Absence of any major medical, cardiovascular, endocrine, and neurological condition as determined by self-reported responses to the Medical History Screener * In possession of a valid drivers' license with at least two years of driving experience * English-speaking (able to provide consent and complete questionnaires) * Written Informed Consent Exclusion Criteria: * Any serious prior adverse response to cannabis * History of or current substance use disorder as determined by self-reported responses to the Internalizing, Externalizing, and Substance Use Disorder Screener * Pregnancy or lactation (pregnancy test, if needed) * Use of medications that may impact driving ability (e.g., mood stabilizers, sedatives)

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Conditions

The condition(s) this trial relates to.

cannabis dependence cognitive disorder Cognitive Dysfunction Psychomotor Disorders

As listed by the trial registrant

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

Impairment of attention Impairment, cognitive Impairment, psychomotor

Contacts and locations

Locations

  • University of Wisconsin

    Madison, Wisconsin, 53792, United States

More trials for these conditions

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