Clinical benefits and considerations of dextromethorphan and bupropion administered separately for managing...

MDD can affect anyone regardless of age, and it often starts during late teens or early adulthood. Although some patients with MDD have an adequate response to medications, only approximately 50% respond to the first treatment, and approximately 30% do not achieve remission despite multiple interventions. Several strategies exist for treating patients who have failed multiple first-line agents, including switching to first-generation antidepressants or to antidepressants unavailable in generic. Other options include augmenting the current antidepressant with other medications such as antipsychotics. Alternatively, augmentation with electroconvulsive therapy, transcranial magnetic stimulation, or esketamine nasal spray can be considered. Prescribing antidepressants unavailable in generic limits accessibility to patients due to cost and prior authorization process. Dextromethorphan/bupropion, a new combination therapy, has shown promise in the treatment of MDD with efficacy seen as early as week 1. Although commercially available, cost and insurance limitations may necessitate consideration of separate administration of its components. This case report describes a 31-year-old male with a history of treatment-resistant depression and alcohol use disorder who experienced symptom improvement on bupropion and dextromethorphan. This case shares observations and clinical considerations of using such combinations in the management of treatment-resistant depression in the context of substance use disorder.