Zolpidem is indicated only for short-term management (7-10 days) of insomnia. The elderly client who is on long-term therapy for insomnia might experience brain dysfunction as the medication accumulates in the brain. Symptoms of agitation and combative behavior needs immediate nursing interventions. For each of the classes listed in Drugs at a Glance, know representative drugs, and explain their mechanisms of action, primary actions, and important adverse effects.