Introduction: To investigate the patterns and correlates of antipsychotic prescriptions among recently discharged inpatients with schizophrenia in China.
Methods: The study included discharged patients from 41 tertiary psychiatric hospitals in 29 provinces between March 19-30, 2019. A total of 1032 inpatients with schizophrenia were included. Socio-demographic and clinical data were retrieved from medical records upon discharge.
Results: Patients received a total of 13 unique antipsychotic medications, which included 9 s-generation antipsychotics (SGAs) and 4 first-generation antipsychotics (FGAs). The utilization rates of SGAs and FGAs were 98.8 % and 6.1 % respectively. The three most commonly antipsychotic medications were risperidone (35.1 %), olanzapine (31.3 %), and clozapine (24.6 %). The mean chlorpromazine equivalent dose was 452.12 ± 230.74 mg/day. The utilization rate of mood stabilizers was 18.9 %, 8.8 % for antidepressants, 20.3 % for sleep improvers, and 9.9 % for anticholinergics. More than two fifths patients (43.1 %) received two or more antipsychotic medications. Predictors of antipsychotic polypharmacy included younger age, residing in Central or West China, a longer duration of illness, a history of prior hospitalizations, and having agitated behavior during the hospitalization.
Conclusion: Antipsychotic polypharmacy in China is common on inpatients settings. The proportion of antipsychotic polypharmacy in China is higher than in many other countries, despite limited data to support the efficacy of many combinations. Clozapine remains one of most commonly prescribed antipsychotics in China, either as a monotherapy or combination therapy.
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