Central nervous system medication changes and falls in nursing home residents.

We investigated the role of changes in 6 mutually exclusive medication categories on the risk of falling in nursing home residents. The 6 categories were: gastrointestinal, hypoglycemics, antibiotics, central nervous system (CNS) acting, cardiovascular disease agents, and analgesics. A change was defined as a new start, a dose change, an as-needed dose, or a discontinuation.