Online brief advice for heavy cannabis users

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

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.

Why it matters

Who can join: the full rules

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 it's running

• Denmark Hill
  London, Greater London, United Kingdom Recruiting

Study contacts

• Study coordinator: Edward Chesney, MRCPsych
• Email: edward.chesney@kcl.ac.uk
• Phone: 02078365454

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.