Inclusion Criteria:  Participants must be 18 years old and older English-speaking Hospitalized at Massachusetts General Hospital, being evaluated by the Addiction Consult Team Meet DSM-5 criteria for at least mild OUD as documented by Addiction Consult Team Have a documented ICD-10 diagnosis of a serious bacterial infection (SBI) requiring 2 weeks or more of antibiotics by any route of administration  Exclusion Criteria:  Individuals currently admitted to an Intensive Care Unit Individuals who are in legal custody or will not be discharged from a controlled environment during the study period Inability to provide informed consent as assessed by the medical team Active COVID-19 infection