This open-label, single-arm Phase IV trial (n=47) will evaluate the efficacy and safety of esketamine nasal spray (flexibly dosed at 56mg or 84mg) in Korean adults with treatment-resistant depression (TRD).
This single-group, open-label Phase IV study will administer intranasal esketamine (56 mg or 84 mg) twice weekly for 4 weeks to adults with treatment-resistant major depressive disorder to assess symptom change.
Primary outcome is change from baseline in the 17-item Hamilton Depression Rating Scale (HAM-D) total score from Day 1 to Day 28; safety and tolerability will be monitored throughout the treatment and follow-up periods.
Flexible-dose intranasal esketamine (56 mg or 84 mg) administered twice weekly for 4 weeks (single-group design).
56 mg delivered using 2 devices (one spray per nostril).
84 mg delivered using 3 devices (rapid succession) per dosing session.