title: Comparing effectiveness of risperidone with first-generation antipsychotic medications in patients with schizophrenia-spectrum disorders.
abstract: This naturalistic retrospective study aims to compare effectiveness of a second-generation antipsychotic medication, risperidone, with first-generation antipsychotic medications (haloperidol and trifluoperazine) in an Asian population with first-episode schizophrenia-spectrum disorders. A total of 261 patients were assessed for time to discontinuation for any reason and specific reasons of discontinuation, controlling for baseline differences between groups. Some 90% of patients discontinued their antipsychotic medications before 18 months. Median time to discontinuation for any reason in risperidone was 69 days versus first-generation antipsychotic medications of 27 days. Specifically, the risperidone group had a longer time to discontinuation for any reason than haloperidol (HR = 0.61, p = 0.005) and trifluoperazine groups (HR = 0.63, p = 0.03), as well as a longer time to discontinuation due to intolerability of side effects than haloperidol (HR = 0.50, p = 0.008) and trifluoperazine groups (HR = 0.26, p = 0.001). There were no significant differences between medications for time to discontinuation due to lack of efficacy, patient's/family's decisions or other reasons. We conclude that there is a very high rate of discontinuation of the initial antipsychotic medications for various reasons, with risperidone having an overall longer time to discontinuation compared with first-generation antipsychotic medications.
authors: Early Psychosis Intervention Programme, Institute of Mental Health/ Woodbridge Hospital, 539 747 Singapore. alvinhs_liew@imh.com.sg
authors: Alvin
authors: A
authors: Liew
authors: Swapna
authors: S
authors: Verma
authors: Lye Yin Poon
authors: Abdin
authors: A
authors: Edimansyah
authors: Mythily
authors: M
authors: Subramaniam
authors: Janhavi
authors: J
authors: Vaingankar
authors: Siow Ann Chong
mesh_terms: D000293:Adolescent; D000328:Adult; D014150:Antipsychotic Agents / Q000009:adverse effects / Q000627:therapeutic use*; D044466:Asian People; D005260:Female; D006220:Haloperidol / Q000009:adverse effects / Q000627:therapeutic use; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D011569:Psychiatric Status Rating Scales; D012189:Retrospective Studies; D018967:Risperidone / Q000009:adverse effects / Q000627:therapeutic use*; D012559:Schizophrenia / Q000188:drug therapy*; D012959:Socioeconomic Factors; D016896:Treatment Outcome; D014268:Trifluoperazine / Q000009:adverse effects / Q000627:therapeutic use; D055815:Young Adult
chemical_list: D014150:Antipsychotic Agents; D014268:Trifluoperazine; D006220:Haloperidol; D018967:Risperidone