Online brief advice for heavy cannabis users
Randomised-Controlled Trial of an Online Brief Advice Intervention for Heavy Cannabis Users (RECALIBRATE)
NA · King's College London · NCT07379736
This project will see if a short online video plus personalized feedback about cannabis withdrawal helps daily cannabis users better understand their use and withdrawal symptoms.
Quick facts
| Phase | NA |
|---|---|
| Study type | Interventional |
| Enrollment | 100 (estimated) |
| Ages | 18 Years and up |
| Sex | All |
| Sponsor | King's College London (other) |
| Locations | 1 site (London, Greater London) |
| Trial ID | NCT07379736 on ClinicalTrials.gov |
What this trial studies
This randomized controlled experiment compares a short educational video about cannabis withdrawal plus personalized feedback on the Cannabis Withdrawal Scale to a control condition of a relaxation video and a mood questionnaire. The investigators plan to recruit at least 100 daily or near-daily cannabis users through the Prolific online platform, who will complete a brief screening and a single 10–15 minute online session including baseline measures and the assigned condition. Eligible participants are adults over 18 who use cannabis 25+ days per month and at least 3.5 g per week, fluent in English, and not prescribed medical cannabis. Primary outcomes center on awareness and insight about cannabis use disorder and withdrawal measured immediately after the intervention.
Who should consider this trial
Good fit: Ideal participants are adults (18+) who use cannabis daily or near-daily (25+ days/month and ≥3.5 g/week), are fluent in English, and are not prescribed medical cannabis.
Not a fit: People using prescribed medical cannabis, infrequent cannabis users, or those who cannot read English or lack internet access are unlikely to benefit from or qualify for this online intervention.
Why it matters
Potential benefit: If successful, the intervention could help daily users recognize withdrawal signs and motivate reduced use or help-seeking through a scalable online tool.
How similar studies have performed: Related digital brief interventions and personalized feedback approaches for substance use have produced modest improvements in awareness and short-term use reductions, but withdrawal-focused online interventions for heavy cannabis users are less extensively tested.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Adults (\>18 years) * Daily/near daily cannabis users (25+ days/month, min. 3.5g/week) * Sufficiently fluent in English Exclusion Criteria: * Participant is prescribed medical cannabis by a healthcare professional
Where this trial is running
London, Greater London
- Denmark Hill — London, Greater London, United Kingdom (RECRUITING)
Study contacts
- Study coordinator: Edward Chesney, MRCPsych
- Email: edward.chesney@kcl.ac.uk
- Phone: 02078365454
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions: Cannabis User, Cannabis, Brief Intervention