Antipsychotics in the maintenance phase for psychotic depression

Area of Science:

• Psychiatry
• Pharmacology
• Clinical Research

Background:

• Psychotic unipolar depression poses significant risks of relapse and suicide.
• Maintenance treatment strategies for psychotic unipolar depression are critical for patient outcomes.
• The role of antipsychotics as adjunctive maintenance therapy alongside antidepressants requires further investigation.

Purpose of the Study:

• To compare the risk of hospital readmission and suicide between patients with psychotic unipolar depression treated with antidepressants alone versus antidepressants plus antipsychotics.
• To evaluate the efficacy of combination therapy versus monotherapy in preventing psychiatric readmission and suicide in this patient population.

Main Methods:

• A cohort of 4391 inpatients diagnosed with psychotic unipolar depression was identified from Swedish national registers (2007-2016).
• Patients were categorized into antidepressant monotherapy or antidepressant plus antipsychotic combination therapy groups based on pharmacy records within 14 days of discharge.
• A 2-year follow-up period was used to assess the primary outcome of hospital readmission for any psychiatric disorder, suicide attempt, or completed suicide, analyzed using Cox regression adjusted for multiple covariates.

Main Results:

• The study identified 2972 patients in the combination therapy group and 1419 in the monotherapy group.
• After 2 years, 42.3% of the combination group and 36.6% of the monotherapy group experienced the primary outcome.
• Antidepressant monotherapy was significantly associated with a reduced risk of readmission or suicide (hazard ratio = 0.86; 95% CI: 0.77-0.95).

Conclusions:

• Adding antipsychotics to antidepressant maintenance therapy for psychotic unipolar depression did not demonstrate an advantage in reducing readmission or suicide risk.
• The findings suggest that current evidence does not support the routine use of antipsychotics for maintenance treatment in this patient group.
• Further research is urgently needed to clarify the role and efficacy of antipsychotics during the maintenance phase of psychotic unipolar depression, considering potential side effects.