Understanding tobacco and cannabis use among young adults

The Impact of Cannabis and Tobacco/Nicotine Product Co-use in Young Adults: Prospective Cessation Evaluation and Substitution

Not applicable Interventional Medical University of South Carolina · NCT06239350

This study looks at how using cannabis affects young adults aged 18-25 who are trying to quit tobacco, while they receive support for their quit attempt over 12 weeks.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment350 (estimated)
Ages18 Years to 25 Years
SexAll
SponsorMedical University of South Carolina Academic / other
Locations1 site (Charleston, South Carolina)
Trial IDNCT06239350 on ClinicalTrials.gov

What this trial studies

This project aims to explore the relationship between tobacco/nicotine and cannabis use among young adults aged 18-25 during a quit attempt for tobacco products. Participants will receive a 12-week cessation treatment for tobacco/nicotine while their cannabis use patterns are monitored. The study employs a behavioral economics framework to evaluate how cannabis co-use impacts nicotine cessation efforts. All procedures are conducted remotely, eliminating the need for in-person visits.

Who should consider this trial

Good fit: Ideal candidates are young adults aged 18-25 who use both tobacco products and cannabis regularly.

Not a fit: Patients who are not interested in quitting tobacco or who have significant medical or psychiatric issues may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved cessation strategies for young adults who use both tobacco and cannabis.

How similar studies have performed: While previous studies have explored tobacco cessation, this approach focusing on nicotine-cannabis co-use is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Between the ages of 18 and 25 years old
* Must use at least one nicotine or tobacco product (nicotine vaping and/or cigarettes) on at least 20 out of the past 30 days for at least the past 3 months
* Must express interest in nicotine cessation (all products)
* Must submit a positive instant-read, oral fluid cotinine sample prior to enrollment
* Must report use of cannabis on at least 10 out of the past 30 days
* Must submit a positive instant-read cannabinoid test prior to enrollment
* Must be able to provide informed consent

Exclusion Criteria:

* Any significant or acutely unstable medical, psychiatric, or substance use problem that would contraindicate research, interfere with safety, compromise data integrity, or preclude consistent study participation
* Pregnant (self-report) or trying to become pregnant
* Self-reported use of medications with smoking cessation efficacy
* Immediate interest in cannabis cessation or treatment

Where this trial is running

Charleston, South Carolina

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Tobacco Use DisorderNicotine Dependencetobaccovapingcessationcannabis/marijuana
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.