The Anchor Study: Digitally Delivered Intervention for Reducing Problematic Substance Use

Not Recruiting

Trial ID: NCT04925570


This study aims to validate W-SUDs as a digitally-delivered substance use disorder program through a fully-powered randomized control trial that will test the comparative efficacy of the mobile-app based substance use disorder program (W-SUDs) to reduce substance use relative to a psychoeducation control condition, which has no cognitive behavioral therapy and the content is not delivered through a conversational user interface.

Official Title

Woebot for Substance Use Disorders Phase 2 RCT: Digitally Delivered Intervention for Reducing Problematic Substance Use

Stanford Investigator(s)

Judith Prochaska

Senior Associate Vice Provost, Clinical Research Governance and Professor of Medicine (Stanford Prevention Research Center)


Inclusion Criteria:

   1. Have a smartphone

   2. Endorse a substance use concern

   3. Be between 18 and 65 years of age

   4. Be available and committed to engage with the Woebot app

   5. Be literate in English. (This is required for inclusion because all materials will be
   in English).

Exclusion Criteria:

   1. Pregnancy (as W-SUDs will not be specifically developed to address the unique needs of
   this population)

   2. Suicide attempt within the past year (12 months)

   3. Symptoms of severe drug/alcohol history: History of delirium tremens; Experiencing
   hypertension, drenching sweats, seizures or confusion after stopping alcohol or drugs;
   Liver trouble (cirrhosis or hepatitis); Convulsions or GI bleeding due to drug/alcohol

   4. Opioid overdose within the past year (12 months)

   5. Opioid misuse without medication-assisted treatment

   6. Not residing in the U.S.

   7. Previous Woebot use


device: W-SUDs

other: Digitally-delivered Psychoeducation

Not Recruiting

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305