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Latino white Medi-Cal beneficiaries with schizophrenia to determine the relationship between patients’ preferred language for mental health services—English, Spanish, or an Asian language—and their adherence to treatment with antipsychotic medications. Methods: Data reflected 31,560 person-years from 1999 to 2004. Pharmacy records were analyzed to assess medication adherence by use of the medication possession ratio (MPR). Clients were defined as nonadherent (MPR<. 5), partially adherent (MPR=. 5–<. 8), or adherent (MPR=. 8–1.1) or as an excess filler of prescriptions (MPR> 1.1). Regression models were used to examine adherence, hospitalization, and costs by race-ethnicity and language status.

Results: Latinos with limited English proficiency were more likely than