Diagnosis of opioid use disorder (DSM-5) with ongoing non-prescription opioid use confirmed by self-report and urine toxicology
Report current opioid craving
Enrolled in a certified Opioid Treatment Program and receiving methadone maintenance treatment
Stable methadone dose prior to enrollment
You may not be if
Participants will be excluded if they:
Are pregnant
Have frequent illicit stimulant use or acute stimulant intoxication
Are using substances or medications that may interfere with study assessments (e.g., stimulant medications, buprenorphine-based therapies, naltrexone)
Have significant neurological conditions (e.g., stroke, epilepsy, brain tumor), abnormal EEG findings, history of brain surgery, significant head injury, or unexplained syncope
Have contraindications to noninvasive brain stimulation (e.g., metal in the head, implanted brain devices)
Have moderate to severe depression or active suicidal ideation/behavior
Have active malignancy
Consume substances that could confound opioid toxicology results (e.g., poppy-seed products)
