The nurse is caring for an elderly client who has been taking cimetidine (Tagamet) for a year. The nurse should monitor for which central nervous system side effects?

Numbers 2, 3, and 5 are correct.

Rationale: Older clients are more susceptible to CNS side effects of cimetidine, including agitation, confusion, and disorientation. Tetany is a neuromuscular side effect of hypomagnesemia. Constipation is a side effect of cimetidine in the GI system.