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Can a text message stop impaired driving?

NCT ID NCT05537116

Prevention Sponsor: Western Kentucky 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 31, 2026 · Last updated Sep 01, 2026 · Updated 1 time

Summary

This trial tests whether personalized feedback sent by text message can reduce driving after cannabis use among young adults. Participants are 149 people aged 18 and older who have driven after using cannabis at least three times in the past three months. They are randomly assigned to receive either general substance information, personalized feedback, or personalized feedback plus interactive text messages. Researchers measure self-reported driving after cannabis use at 3 and 6 months to see if the intervention makes a difference.

What this could mean

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

Active substance
Personalized feedback delivered via text message and a secure website
What this could lead to
If effective, this approach could offer a low-cost, scalable way to reduce cannabis-impaired driving among young adults.
What could go wrong
The trial is small and relies on self-reported driving behavior, which may not reflect real-world changes. The intervention may not sustain its effects over time.

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

149 people

The number who actually took part.

Started

Oct 2022

Finished

Mar 2026

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 29 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: * Age 18 or older * Ability to speak, read, and write in English * Reports driving after using cannabis prior to driving at least three times in the past three months * Reports having access to a motor vehicle, a valid driver's license, and plans to drive a vehicle in the next 6 months * Reports access to a cell phone and willingness to read intervention material and exchange 3 texts post intervention with the study administrator * Reports a valid email address Exclusion Criteria: * Currently in treatment for substance use

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As listed by the trial registrant

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

Driving impaired

Contacts and locations

Locations

  • Kelly Thompson Hall

    Bowling Green, Kentucky, 42101, United States

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