Psychotropic polypharmacy for the treatment of bipolar disorder in Taiwan
Objective:
Psychotropic polypharmacy in the treatment of bipolar disorder has proliferated. Yet evidence about the prevalence and predictors of different combinations of polypharmacy in inpatient settings is scarce.
Methods:
The Nationwide Psychiatric Inpatient Medical Claims (2000-2007) in Taiwan were used to examine prescriptions for mood stabilizers, antipsychotics, and antidepressants among recently discharged patients with bipolar disorder (N=5,449; 51% women, mean±SD age=36.8±12.4).
Results:
A total of 71% of prescriptions involved between-class polypharmacy, and 17% involved within-class polypharmacy. Patients older than 50 and patients at medical centers (>500 beds) were less likely to receive polypharmacy. Lower prescribed doses predicted polypharmacy. Receiving polypharmacy was not associated with a higher rate of readmission within one year.
Conclusions:
There was substantial use of various forms of polypharmacy in the treatment of inpatients with bipolar disorder. Randomized studies should be used to compare the cost-effectiveness of common psychotropic combinations and monotherapy to treat bipolar disorder.
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