Monthly Injectable BUP for MA Use Disorder (MURB) Trial

Primary Objective: To evaluate whether assignment to 12 weeks of outpatient BUP-Inj compared to 12 weeks of outpatient PBO-Inj reduces MA use (as measured by twice-weekly urine drug screens (UDS)) during Weeks 9-12 in participants with moderate to severe MUD with co-occurring mild opioid use disorder (OUD) or opioid misuse not warranting medication for opioid use disorder (MOUD). Secondary Objectives: To evaluate whether assignment to 12 weeks of outpatient BUP-Inj compared to 12 weeks of outpatient PBO-Inj among participants with moderate to severe MUD with co-occurring mild OUD or opioid misuse not warranting MOUD improves: 1) outcomes related to alternate measures of MA use including total number of MA negative urine drug screens (UDS) during study and self-reported days of MA use; 2) measures of opioid use and self-reported frequency of opioid use; and 3) measures of MA and opioid co-use and self-reported days of MA and opioid co-use.