Investigating Two rTMS Strategies to Treat Cannabis Use Disorder

In this trial we will work with a group of participants who are having problems related to marijuana use (they have Cannabis Use Disorder) and who want to reduce the amount of marijuana they use or quit using marijuana completely. We are testing to see if a treatment called repetitive transcranial magnetic stimulation (rTMS) can help them achieve that goal when combined with a brief three-session counseling therapy. Participants will receive rTMS to one of two different parts of the brain (the dorsolateral prefrontal cortex--the DLPFC or the ventromedial prefrontal cortex--the vmPFC) to see if applying rTMS to one brain area is more helpful than the other brain area.