High dose antipsychotic use in schizophrenia: Findings of the REAP (Research on East Asia Psychotropic Prescriptions) study
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AbstractBackground: High-dose antipsychotic regimes (defined as the prescription of more than 1000 chlorpromazine-equivalents milligrams of antipsychotic per day) in the management of patients with schizophrenia are not uncommon, but most reports are from western countries. Recent functional neuroimaging studies have found that the previous notion concerning the use of antipsychotic medication, especially in high doses, was unsupported and untenable. Methods: This international study examined the use of high dose antipsychotic medication and its clinical correlates in schizophrenia patients within six East Asian countries/territories. Results: Within the study group (n = 2399), 430 patients (17.9%) were prescribed high dose antipsychotics. Antipsychotic use varied significantly between countries, with Japan, Korea, and Singapore using higher doses than the other countries. High dose antipsychotic use was associated with younger age in Japan (p < 0.001), longer duration of admission (p < 0.001), duration of illness (p < 0.001, particularly in Korea and Taiwan), positive psychotic symptoms (p < 0.001, particularly in Japan and Korea), and aggression (p < 0.05, particularly in Japan), and also with a higher likelihood of extrapyramidal and autonomic adverse effects (p < 0.05, particularly in China). Country, younger age, the presence of delusions and disorganized speech, polypharmacy, and receiving depot medication but not atypical antipsychotic drugs were important predictors of high antipsychotic use.
All Author(s) ListSim K, Su A, Leong JY, Yip K, Chong MY, Fujii S, Yang S, Ungvari GS, Si T, Chung EK, Tsang HY, Shinfuku N, Kua EH, Tan CH
Journal namePharmacopsychiatry
Volume Number37
Issue Number4
Pages175 - 179
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesPharmacology & Pharmacy; PHARMACOLOGY & PHARMACY; Psychiatry; PSYCHIATRY, SCI

Last updated on 2021-21-06 at 00:32