The purpose of this study was to assess trends in utilization and costs of antipsychotic drugs among a population of older adults over time, with respect to the prevalence of users, shifts in prescribing patterns, and related financial implications.
Cross-sectional time series of quarterly and annual antipsychotic utilization and cost were obtained from administrative databases for calendar years 1993 through 2002.
A population-based study of more than 1.4 million residents of the province of Ontario aged 65 years or older.
Data sources used included the Ontario Drug Benefits (ODB) database and Statistics Canada census data.
The prevalence of antipsychotic users increased by 34.8% over the study period from 2.2% at the beginning of 1993 to 3.0% of the elderly at the end of 2002 (p