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Study tests how a drink and a puff impact your driving

NCT ID NCT02404688

Knowledge-focused Sponsor: Yale University 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at how small amounts of alcohol and THC (the active part of cannabis) affect driving in a simulator. Forty adults aged 21 to 55 who have used both substances before will take part. The goal is to understand how these drugs change driving performance and thinking, which could help make roads safer.

What this could mean

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

Active substance
THC and ethanol
What this could lead to
If successful, this study could help clarify how low doses of alcohol and cannabis impair driving, potentially informing safer driving guidelines.
What could go wrong
This is a small, early-phase lab study with only 40 participants. Results may not reflect real-world driving or apply to higher doses or different populations.

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

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 40 people

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

Start date

Dec 2015

Expected to finish

Dec 2026

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

21 to 55 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: * Males or females 21 to 55 years of age (extremes included). * Exposed to cannabis at least once. * Exposed to alcohol at least once. * Able to provide informed consent. Exclusion Criteria: * Cannabis naive. * Alcohol naive. * Positive pregnancy screen * Hearing deficits.

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Conditions

The condition(s) this trial relates to.

cannabis dependence

As listed by the trial registrant

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

Alcohol effect Cannabis Driving under the influence of alcohol and other drugs

Contacts and locations

Locations

  • Biological Studies Unit, VA Connecticut Healthcare System

    West Haven, Connecticut, 06516, United States

More trials for these conditions

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