sTMS for Substance Use-disordered Veterans

Inclusion Criteria: * Eligible male and female Veterans * between ages 18-70, * Veterans who currently meet criteria for SUD, and, if applicable, have stable treatment regimen (i.e., medications and/or therapy) for at least 6 weeks prior to study procedures * ongoing medications and psychotherapy will be allowed to continue unchanged during the study * for safety, participants must also meet established criteria for MRI exposure, which is implemented as a conservative measure given the novel application of sTMS in this population Exclusion Criteria: * pregnancy/lactation, * history of moderate or severe traumatic brain injury, * current or prior neurologic disorder or lifetime history of * seizure disorder * CNS tumors * stroke * cerebral aneurysm, * unstable medical condition, * active suicidality as assessed with the Columbia-Suicide Severity Rating Scale * primary psychotic disorder.