Comparison of ketamine with buprenorphine as adjunctive therapy in the treatment of comorbid major depressive disorder and opium use disorders: A randomized controlled trial

Background Comorbid major depressive disorder (MDD) and opium use disorder (OUD) are known to increase the risk of suicide. The purpose of this study was to compare the efficacy and safety of adjunctive therapy with either ketamine or buprenorphine in patients with comorbid MDD and OUD. Methods This was a randomized double-blind controlled trial in adults admitted to a hospital in Iran. Sixty-six participants were enrolled and received either ketamine or buprenorphine, along with current antidepressant therapy. The primary outcome was change in depressive symptoms assessed using the Beck Depression Inventory (BDI) after 2 hours, 24 hours, and 7 days following initiation of treatment. Secondary outcomes included changes in suicidal ideation, evaluated by the Beck Scale for Suicidal Ideation (BSSI). Results Both groups experienced a significant decrease in the severity of depression following the interventions (p < .05). However, there was no significant difference in the between-group comparison (p > .05). Both groups also exhibited a significant reduction in suicidal ideation compared to before the study, with the decrease in severity being over 85% in both groups (p < .05). Conclusion Both ketamine and buprenorphine appear to be equally effective in reducing symptoms of depression and suicidal ideation among individuals with MDD and OUD.