Cognitive behavioral therapy did not significantly outperform other treatments for reducing cannabis use in a meta-analysis of 9 trials

Q: Does CBT help people stop using cannabis?

This meta-analysis found CBT did not significantly outperform other psychosocial treatments for reducing cannabis use frequency, suggesting it may not have a specific advantage over alternative approaches.

Q: What treatments work for cannabis use disorder?

The finding that CBT performed similarly to contingency management and other approaches suggests multiple psychosocial treatments can be effective. The field is moving toward identifying which treatment works best for which individual.

A meta-analysis of nine RCTs with 1,280 participants found CBT did not produce significant reductions in cannabis use frequency compared to contingency management, treatment as usual, or other psychosocial interventions at any time point.

Ullah, Safat et al.·Cognitive behaviour therapy·2026·Strong EvidenceSystematic Review

Addiction (1380)Quitting (221)

Quick Facts

Study Type

Systematic Review

Evidence

Strong Evidence

Sample

N=1,280

What This Study Found

CBT did not significantly reduce cannabis use frequency at short-term (effect=0.12, p=0.10), medium-term (effect=-0.03, p=0.75), or long-term (effect=0.01, p=0.91) follow-ups compared to control conditions. Daily consumption showed a significant medium-term effect (-0.50, p<.05) but insignificant effects at other time points.

Key Numbers

2,347 records screened, 9 RCTs included, 1,280 participants. Short-term: 0.12 (95% CI -0.02 to 0.26, p=0.10). Medium-term: -0.03 (95% CI -0.18 to 0.13, p=0.75). Long-term: 0.01 (95% CI -0.18 to 0.20, p=0.91). Daily consumption medium-term: -0.50 (p<.05).

How They Did This

Systematic review and meta-analysis of MEDLINE, PsycINFO, CINAHL, AMED, Cochrane Library, and clinical trial registries. Nine RCTs involving 1,280 participants were included. Quality assessed using Cochrane Risk of Bias tool.

Why This Research Matters

CBT is often considered a first-line psychosocial treatment for cannabis use disorder. This meta-analysis challenges that assumption by showing it does not clearly outperform other approaches, suggesting the field needs to reconsider treatment recommendations.

The Bigger Picture

The finding that CBT does not outperform other psychosocial treatments does not mean therapy is useless for cannabis use, but rather that no single approach has established superiority. This opens the door for integrative or personalized treatment strategies.

What This Study Doesn't Tell Us

Only nine RCTs available, with study heterogeneity, small sample sizes, and risk of bias. Comparison conditions varied (contingency management, TAU, other psychosocial). Unstandardized CBT content across studies. Cannot assess which CBT components might be effective.

Questions This Raises

?Would standardized CBT protocols perform better?
?Is CBT more effective when combined with contingency management or pharmacotherapy?
?Are there patient subgroups for whom CBT is particularly effective or ineffective?

Trust & Context

Key Stat:: CBT: no significant advantage over other treatments at any time point
Evidence Grade:: Strong: systematic review with meta-analysis of RCTs, though limited by small number of included studies and heterogeneity.
Study Age:: Published 2026.
Original Title:: Effectiveness of cognitive behavioral therapy for harmful cannabis use: a systematic review and meta-analysis.
Published In:: Cognitive behaviour therapy, 1-21 (2026)
Authors:: Ullah, Safat, Ullah, Asad, Ahmad, Fayaz, Latif, Abdul, Sohaib, Muhammad, Khan, Muhammad Firaz, Ahmad, Bilal, Yadegarfar, Ghasem, Farooq, Saeed, Naeem, Farooq, Paudyal, Priyamvada
Database ID:: RTHC-08677

Evidence Hierarchy

Meta-Analysis / Systematic ReviewCombines many studies into one answer

This study

Randomized Controlled Trial

Cohort / Case-Control

Cross-Sectional / Observational

Case Report / Animal Study

Analyzes all available research on a topic using a structured method.

What do these levels mean? →

Frequently Asked Questions

Does CBT help people stop using cannabis?

This meta-analysis found CBT did not significantly outperform other psychosocial treatments for reducing cannabis use frequency, suggesting it may not have a specific advantage over alternative approaches.

What treatments work for cannabis use disorder?

The finding that CBT performed similarly to contingency management and other approaches suggests multiple psychosocial treatments can be effective. The field is moving toward identifying which treatment works best for which individual.

Cite This Study

RTHC-08677·https://rethinkthc.com/research/RTHC-08677

APA

Ullah, Safat; Ullah, Asad; Ahmad, Fayaz; Latif, Abdul; Sohaib, Muhammad; Khan, Muhammad Firaz; Ahmad, Bilal; Yadegarfar, Ghasem; Farooq, Saeed; Naeem, Farooq; Paudyal, Priyamvada. (2026). Effectiveness of cognitive behavioral therapy for harmful cannabis use: a systematic review and meta-analysis.. Cognitive behaviour therapy, 1-21. https://doi.org/10.1080/16506073.2026.2613114

MLA

Ullah, Safat, et al. "Effectiveness of cognitive behavioral therapy for harmful cannabis use: a systematic review and meta-analysis.." Cognitive behaviour therapy, 2026. https://doi.org/10.1080/16506073.2026.2613114

RethinkTHC

RethinkTHC Research Database. "Effectiveness of cognitive behavioral therapy for harmful ca..." RTHC-08677. Retrieved from https://rethinkthc.com/research/ullah-2026-effectiveness-of-cognitive-behavioral

Access the Original Study

View on PubMed View via DOI

Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.

This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.

← Back to Research Database