Targeting Tobacco Cessation During Treatment for Cannabis Use Disorders

Study Overview
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Brief Summary
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This project aims to develop and test an intervention for the simultaneous treatment of cannabis use disorders and tobacco smoking. This is important because over 50% of adults seeking treatment to help stop cannabis use also smoke tobacco regularly, which decreases their chance for a successful treatment outcome and increases adverse acute and long-term psychosocial and health consequences. The proposed treatment will integrate existing computer-based behavioral interventions for cannabis and tobacco and use nicotine replacement medications to improve outcomes in this difficult to treat clinical population.

Detailed Description
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Approximately 50% of persons seeking treatment for cannabis-use disorders (CUDs) regularly smoke tobacco. Combining tobacco with cannabis has become a common method of smoking cannabis. Similarities of use, and using together, can make quitting difficult. Stopping tobacco simultaneously with cannabis may be beneficial. Little scientific information currently addresses how to best target tobacco smoking during treatment for CUDs. Our long-term goal is to develop an effective protocol for intervening in tobacco smoking without changing cannabis outcomes. A two-phase, Stage 1 therapy development project will accomplish the following: First, a treatment protocol and manual will be developed that integrates a tailored intervention for tobacco smoking with an intervention for CUD (Aim 1). Utilization of web-based counseling programs will standardize delivery of the intervention and foster eventual dissemination. A pilot study will provide an initial test of acceptability and feasibility. Second, a Stage 1, proof-of-concept study will compare this intervention to one that targets CUD only (Aim 2). The hypotheses assert that the intervention (1) will be accepted by the majority of eligible participants (2) will result in more tobacco quit attempts and rates than the CUD-only treatment; and (3) will not adversely affect cannabis outcomes. Last, the project will evaluate the potential of specific moderators of outcomes to predict outcomes and inform subsequent treatment development efforts (Aim 3). If the hypotheses were confirmed, dissemination of this protocol would reduce adverse psychosocial and health consequences of tobacco or cannabis dependence. Findings will inform future development of prevention and intervention strategies.

Official Title
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Targeting Tobacco Cessation During Treatment for Cannabis Use Disorders

Conditions
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Cannabis Dependence

Intervention / Treatment
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* Behavioral: MET/CBT/CM plus NRT


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18-65 years old current DSM-IV diagnosis of cannabis abuse or dependence report use of cannabis on at least 45 of previous 90 days report regular use of tobacco cigarettes or report that their primary administration of cannabis is via blunts or spliffs some indication of interest in quitting tobacco in the next 6 months (rating of 2 or more on a 5-point interest scale Exclusion Criteria: current dependence on alcohol or any drug other than tobacco and cannabis active or recent suicidal ideation use of non-tobacco nicotine current participation in treatment for substance abuse severe psychological distress (e.g., active suicidal plans, psychosis, debilitating panic disorder). a condition that requires seeing a physician before using NRT (e.g., pregnancy or recent heart attack legal status that would interfere with participation living with someone enrolled in the project not living within 30 miles of the research site (unless an exception is authorized by the PI) not being fluent in english

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: MET/CBT/CM plus NRT<br>Motivational Enhancement Therapy, Cognitive Behavior Therapy, Contingency Management plus Nicotine Replacement Therapy (MET/CBT/CM) + NRT Behavioral Treatment for Cannabis plus Behavioral Treatment for Tobacco: both primarily delivered by computer. Additional NRT. | Behavioral: MET/CBT/CM plus NRT<br>* Behavioral Treatment for Cannabis plus Behavioral Treatment for Tobacco: both primarily delivered by computer. Additional NRT.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Tobacco Quit Attempts | Sum of 24 hour quit attempts | Will be assessed for the duration of study, an average of 16 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cannabis Abstinence: continuous weeks of abstinence achieved during the 12 week treatment period | Urinalysis tests and self-report data will be collected twice per week during participation in the study | Will be assessed twice per week for the duration of the study treatment period, 12 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Tobacco Use