Efficacy and Safety of Atypical Antipsychotics for Behavioral and Psychological Symptoms of Dementia Among Community Dwelling Adults

Introduction: Options for the treatment of the behavioral and psychological symptoms of dementia (BPSD) are limited. Atypical antipsychotics are often used but have questionable efficacy and are generally considered high risk. Therefore, the objective of this study is to evaluate the efficacy and safety of using any atypical antipsychotic for the treatment of BPSD among outpatients. Methods: Retrospective observational study of an academic outpatient memory disorders clinic. Participants included any community-dwelling patient with a diagnosis of dementia, not trauma induced, with documented BPSD treated with an atypical antipsychotic for at least 2 weeks. Medical records were reviewed from January 1, 1990 to March 23, 2010. Safety outcomes were documented from the time of antipsychotic initiation, and behavioral/psychological efficacy outcomes were documented beginning 2 weeks after antipsychotic therapy was initiated, until the last documentation available. Results: A total of 87 distinct antipsychotic treatment periods for 81 unique patients were included. Antipsychotic treatment was continued for more than a year in 33% of patients and only 17% of patients discontinued antipsychotic treatment over the entire period. The behavioral/psychological outcomes improved for 24 (28%) treatments, remained stable for 17 (20%) treatments, and worsened for 46 (53%) treatments. Adverse events were reported by 53% of patients, with the most common adverse events being metabolic, fall related, type, and vascular. Few adverse events were severe. The odds ratio of adverse events per every 90-day increase in duration of treatment was 1.20 (P = 0.02). Conclusion: Antipsychotic treatment improved behavioral/psychological symptoms for less than one-third of patients and increased the potential risk of adverse events for more than half of patients.