This is a double-blind, crossover trial that will recruit a cohort of non-treatment seeking Cannabis use disordered participants. Participants will then undergo either active, or sham rTMS to the LDLPFC, and cue-induced craving, and risky decision making will be assessed.

Our primary aims are to determine the effect of a single session of 10 Hz L DLPFC rTMS on cannabis cue induced craving (Aim1), and behavioral tasks of impulsive decision making (Aim2), in non-treatment seeking individuals with Cannabis Use Disorder. The aims of the study will be accomplished by performing a double-blind, sham-controlled crossover trial. Non-Treatment seeking individuals with CUD will be recruited through media advertisements, as well as via a pre-established database of non-treatment seeking individuals who have participated in previous Cannabis trials and agreed to be re-contacted. Interested individuals will undergo a brief phone screen to determine if they meet general inclusion/exclusion criteria, and if so will be invited to meet with study personnel in order to sign informed consent, and undergo a screening visit. There will then be two experimental visits separated by at least one week. During each of these visits participants will undergo either a real, or sham rTMS treatment, as well as a cannabis cue Paradigm. Data on craving as well as on impulsive decision making will be collected before and after each treatment.

Inclusion Criteria:

1. Participants must be able to provide informed consent and function at an intellectual level sufficient to allow accurate completion of all assessment instruments.
2. Participants must be between the ages of 18 and 60.
3. Participants must meet DSM-V criteria for Cannabis Use Disorder, with use of at least 20 days/month.
4. Participants must agree to abstinence from Cannabis for at least 24 hours prior to each visit.
5. Participants must have a Positive UDS for cannabis (confirming they are regular users), and a negative salivary cannabis test (Confirming no use within 10-14 hours)

Exclusion Criteria:

1. Participants must not be pregnant and participate in the study.
2. Participants must not test positive for any substance other than cannabis on UDS.
3. Participants must not meet criteria for any other Substance Use Disorders with the exception of Nicotine Use Disorder.
4. Participants must not be on any medications that have central nervous system effects.
5. Participants Must not have a history of/or current Psychotic disorder.
6. Participants must not have a history of Dementia or other cognitive impairment.
7. Participants must not have active suicidal ideation, or suicide attempt within the past 90 days.
8. Participants must not have any contraindications to receiving rTMS as assessed by the TMS safety sheet.
9. Participants must not have any unstable general medical conditions.