About this trial
The goal of this clinical trial is to learn how adding brain stimulation to a brief counseling session affects adults with cannabis use disorder. The counseling session uses motivational interviewing, which helps people talk through their reasons for changing or not changing cannabis use. The brain stimulation is called transcranial alternating current stimulation (tACS). tACS uses electrodes on the scalp to give a very weak electrical current for a short time.
The main questions it aims to answer are:
* Does active tACS affect what participants say during the counseling session? * Does active tACS change brain activity after the session? * Is active tACS related to less cannabis use during the month after the session?
Researchers will compare motivational interviewing with active tACS to motivational interviewing with placebo stimulation. Placebo stimulation uses the same setup but does not provide the active 30-minute stimulation. Participants will be assigned by chance to one of these groups, and neither participants nor the study staff member running the session will know which type of stimulation is used.
Participants will complete questionnaires, breath and urine tests, a recorded counseling session during active or placebo stimulation, MEG and MRI brain scans, daily text-message check-ins about cannabis use, and follow-up questionnaires about one month later.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
self-identification as having problematic cannabis use
age 21-65 years
SCID-5-RV module E indicating current cannabis use disorder
Disqualifiers
currently engaged in treatment for any substance use disorder (SUD)
receiving treatment for any SUD within the prior 30 days
history of brain injury or major neurological diagnosis, vascular/neurodegenerative disorder, or complex primary headache disorder
evidence of current psychosis
Trial design
Parallel
Treatments tested in this trial
transcranial alternating current stimulation
DeviceActive transcranial alternating current stimulation
sham transcranial alternating current stimulation
Devicesham transcranial alternating current stimulation including 30 seconds of ramp-up and ramp-down at the beginning and end of the session, with no stimulation between ramping procedures.
Motivational interviewing (MI)
Behavioral30 minute motivational interviewing session
Treatment groups
Trial outcomes
Primary outcomes
Client speech
Motivational Interviewing Skill Code-defined change talk (CT; higher scores are better) and sustain talk (ST; lower scores are better) assessed via CASAA Application for Coding Treatment Interactions and session audio recording.
Cannabis use
Timeline follow-back (TLFB) measure
MEG
Beta-band activity assessed using MNE-python
Secondary outcomes
Cannabis use
Urine drug screen (UDS) measure
Sponsors and contacts
Click on the lead sponsor to view all of their trials.
The Mind Research Network
Lead sponsor
National Institute on Drug Abuse (NIDA)
Collaborator
This trial is not recruiting at the moment. You can still explore other options: