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Flavored vapes may rewire Brain's reward system

NCT ID NCT05836051

Knowledge-focused Sponsor: Milton S. Hershey Medical Center 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 07, 2026 · Updated 1 time

Summary

This study looked at whether flavor chemicals in e-cigarettes can make them more addictive by changing brain function. 36 regular tobacco users (ages 21-60) had their brain activity measured while vaping, and their puffing behavior was tracked over 10 days. The goal was to understand how flavors might increase addiction risk, not to test a treatment.

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

36 people

The number who actually took part.

Started

Jun 2023

Finished

Jul 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

21 to 60 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: 1. 21 to 60 years old 2. Regular users of inhaled tobacco products (≥5 days out of the last 28) 3. Not planning to quit tobacco use within next month 4. Able to read and write in English Exclusion Criteria: 1. Major neurological conditions or brain trauma 2. Current substance use impairing participation 3. Unstable or significant medical conditions (e.g., COPD, coronary heart disease) 4. Current use of smoking cessation medication (e.g., varenicline, patch) 5. Uncontrolled serious mental illness, suicidality, or inpatient psychiatric hospitalization in the past 6 months 6. Known allergic reaction to ENDS liquids ingredients propylene glycol or vegetable glycerin 7. Unable to use study provided ENDS ad-libitum for at least 3 hours per day 8. Pregnant or breastfeeding as indicated by self-report or urine pregnancy screen MRI-specific exclusion criteria: 1. MRI safety contraindications (e.g., metal implants, claustrophobia) 2. Major neurological conditions or brain trauma

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Conditions

The condition(s) this trial relates to.

Behavior, Addictive nicotine dependence Smoking

As listed by the trial registrant

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

Tobacco dependence

Contacts and locations

Locations

  • Penn State Health

    Hershey, Pennsylvania, 17033, United States

More trials for these conditions

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