ScienceDaily (Apr. 16, 2008) — Elderly patients who use antipsychotic drugs have a 60 percent increased risk of developing pneumonia compared to non-users. This risk is highest in the first week following prescription and decreases gradually thereafter. Antipsychotic drugs are frequently used in elderly patients for the treatment of psychosis and behavioral problems associated with dementia and delirium. This study is the first to show that the development of pneumonia is associated with antipsychotic drug use.