A Clinical Trial of Adaptive Treatment for Early Smoking Cessation Relapse (ADAPT)

This is a research study to find out if treatment decision making can be improved for smokers who find it difficult to quit with medications. Everyone who participates in this study will receive free product, either nicotine replacement therapies (patches and lozenges), varenicline, or a harm reduction product (e-cigarette) for a full 12 weeks. Most participants will receive some combination of these treatments, depending on individual response to each.

All visits and study assessments will be entirely remote. All treatments will be provided free of charge for the first 12 weeks. After that, the study team will contact the participants 6 months after the first study phone call to complete another survey. The study lasts six months and will involve 8 surveys.

Study Overview

• Status: Recruiting
• Conditions: Treatment; Cigarette Smoking; Smoking Behaviors
• Intervention / Treatment: Behavioral: Switching to a different medication; Behavioral: Continued use of the same medication; Behavioral: Switching to a harm reduction tobacco product

Detailed Description

Treatment seeking smokers across both Alabama and South Carolina (N=544) will be recruited and consented through established online methods and randomized to receive a 4-week course of either varenicline or combination NRT (patch + lozenge), counterbalanced. Using a concrete and measurable indicator of early treatment success (3 days non-smoking), smokers demonstrating early success at 4 week follow-up will continue with another four weeks of same medication, either varenicline or combination NRT. Those who do not demonstrate early success will be randomized to a subsequent 4-week course of either a) continuation of same medication, or b) switch to the other FDA approved option, either varenicline or combination NRT. The same process will repeat at Week 8, wherein treatment responders will continue with their ongoing medication and non-responders will be randomized to a final 4-week course of either a) continuation of same medication or b) switch to an e-cigarette. End of treatment outcomes will be assessed at Week 12 at which time no more product will be offered. Final follow-up at Week 24 will ascertain all primary (cessation) and secondary outcomes.

• Study Type: Interventional
• Enrollment (Estimated): 544
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Tracy T Smith, PhD; Phone Number: 8438725164; Email: smithtra@musc.edu
• Study Contact Backup: Name: Matthew J Carpenter, PhD; Phone Number: 8438762436; Email: carpente@musc.edu

Study Locations

• United States
  • South Carolina
    • Charleston, South Carolina, United States, 29425
      • Recruiting
      • Medical University of South Carolina
      • Contact: William McCamy; Email: mccamy@musc.edu

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Smokers who want to quit

Exclusion Criteria:

• Non-smokers

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Adaptive Randomization 1; This arm includes people who did not respond to 4 weeks of pharmacotherapy (either varenicline or combination NRT). After a 4-week course of pharmacotherapy, participants that are not responding to medication will receive four weeks of the other FDA approved option, either varenicline or combination NRT, with instructions to try to quit again	Behavioral: Switching to a different medication; Participants will receive four weeks of the other FDA approved option, either varenicline or combination NRT, with instructions to try to quit again at week 4.
Experimental: Non-Adaptive Randomization 1; This arm includes people who did not respond to 4 weeks of pharmacotherapy (either varenicline or combination NRT). After a 4-week course of pharmacotherapy, participants that are not responding to the medication will receive four additional weeks of the same medication with instructions to try to quit again	Behavioral: Continued use of the same medication; Participants will receive four additional weeks of the same medication (varenicline or NRT) with instructions to try to quit again at week 4.
Experimental: Harm Reduction Randomization 2; This arm includes people who did not respond to two 4-week courses of pharmacotherapy (either varenicline or combination NRT or both). After two 4-week courses of pharmacotherapy, participants who are not responding to medication will be randomly assigned to a harm reduction group (e-cigarettes). Participants assigned to the harm reduction group will receive four weeks of e-cigarette product with instructions to switch completely	Behavioral: Switching to a harm reduction tobacco product; Participants will receive four weeks of e-cigarette products with instructions to switch completely at Week 8
Experimental: Non-Adaptive Randomization 2; This arm includes people who did not respond to two 4-week courses of pharmacotherapy (either varenicline or combination NRT or both sequentially). After two four-week courses of pharmacotherapy, participants that are not responding to the medication will receive four additional weeks of the same medication with instructions to try to quit again.	Behavioral: Continued use of the same medication; Participants will receive four additional weeks of the same medication (varenicline or NRT) with instructions to try to quit again at week 4.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Non-responders after initial course of FDA-approved medication	7-day point prevalence abstinence at Week 8 among non-responders at Week 4	8 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Dependence and duration of longest quit attempt	7-day point prevalence abstinence at Week 12 among non-responders at Week 8.	12 weeks

Collaborators and Investigators

• Sponsor: Medical University of South Carolina
• Collaborators: National Cancer Institute (NCI)

Study record dates

Study Major Dates

• Study Start (Actual): March 25, 2024
• Primary Completion (Estimated): December 1, 2027
• Study Completion (Estimated): March 31, 2028

Study Registration Dates

• First Submitted: November 1, 2023
• First Submitted That Met QC Criteria: November 1, 2023
• First Posted (Actual): November 7, 2023

Study Record Updates

• Last Update Posted (Actual): March 6, 2026
• Last Update Submitted That Met QC Criteria: March 4, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Behavior; Tobacco Smoking; Tobacco Use; Smoking; Cigarette Smoking
• Other Study ID Numbers: 00128175; 1R01CA284649-01 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No