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Study reveals how price drives pot and cigarette habits in young adults

NCT ID NCT07398443

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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

Summary

This study looks at how young adults (ages 18-25) who smoke both marijuana and tobacco decide to use each substance when prices change. Researchers will measure cravings after showing pictures of marijuana or tobacco. The goal is to understand patterns of dual use, not to test a treatment. About 120 participants who buy their own tobacco and marijuana will take part.

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 120 people

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

Started

Feb 2026

Expected to finish

Nov 2028

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 25 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: 1. Males/females who are 18 to 25 years of age 2. Young adults who currently smoke commercial tobacco cigarettes (≥1x weekly in the past 30 days and for the past six months) 3. Young adults who currently smoke marijuana (≥4 times in past 30 days and at least weekly on average for the last six months) 4. Participants must report purchasing their own tobacco and marijuana at least once in the past 6 months 5. Participants must speak, comprehend, and read English. Exclusion Criteria: 1. Intention to quit marijuana or tobacco use in the next 30 days 2. Self-reported illicit drug or heavy episodic alcohol use on \>20 days in the past month (excluding marijuana) 3. Individuals who are pregnant or breastfeeding 4. Positive saliva test for recent THC use 5. Breath alcohol level above 0 at any session. 6. Participants who exclusively roll their own tobacco cigarettes

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Conditions

The condition(s) this trial relates to.

Marijuana Smoking Tobacco Smoking

As listed by the trial registrant

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

Behavioral economics Cannabis smoking Tobacco smoking

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

  • Brown University School of Public Health

    RECRUITING

    Providence, Rhode Island, 02903, United States

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