Identifying Predictors of Primary Adherence to Second Generation Long-Acting Injectable Antipsychotics Following Discharge from an Acute Inpatient Psychiatry Unit.

Objectives: Describe primary adherence and medication persistence to second generation long-acting injectable (LAI) antipsychotics following an inpatient psychiatry hospitalization, compare rates of psychiatric-related hospital readmissions and emergency visits within 6 months of discharge between patients who were adherent versus nonadherent, and explore predictors of primary adherence to second generation LAI antipsychotics following hospitalization.

Experimental Design: This retrospective chart review included patients who received at least 1 dose of a second-generation LAI antipsychotic while hospitalized in an acute care psychiatry unit between April 1, 2016 and July 31, 2017, had active Missouri Medicaid, and continued on the second-generation LAI antipsychotic upon discharge. Patients were excluded if they were discharged to a care setting where medication was administered.

Principal Observations: Seventy-five charts were included. Primary adherence rate was 37% and only 46% of those persisted with LAI antipsychotic treatment over a 6-month time period following discharge. Rates of psychiatric-related readmission or emergency visit within 6 months post-discharge did not differ between groups. No statistically significant correlations between primary adherence and demographic or socioeconomic variables were found.

Conclusions: Primary adherence and medication persistence to second generation LAI antipsychotics following hospital discharge is low with approximately 60% of patients not receiving another injection. Clinicians should consider outpatient medication adherence before initiating a second-generation LAI antipsychotic during hospitalization. Efforts should be made to facilitate adherence to LAI antipsychotics during transition of care from inpatient to outpatient settings.