Many people find the changes in behavior caused by Alzheimer's to be the most challenging and distressing effect of the disease. However, medication, environmental influences, and some medical conditions also can cause symptoms or make them worse. Drug side effects or interactions among drugs can affect behavior. The decision to try medicine to treat behavior problems in Alzheimer's disease is different for each person. Antipsychotic medicines may help relieve more severe agitation or psychosis. People with Alzheimer’s experience changes in their sleep patterns. As with changes in memory and behavior, sleep changes somehow result from the impact of Alzheimer’s on the brain. A variety of medications are used in the management of sleep disorders in Alzheimer's disease including atypical antipsychotics, benzodiazepines, non-benzodiazepine hypnotics, melatonin, sedating antidepressants and antihistamines. However, to date, there is limited research on the safety and efficacy of these medications in patients with AD. Alzheimer’s disease is best known as a memory disorder. However, behavioral and psychiatric symptoms may also occur. Many, but not all, individuals with Alzheimer’s will develop them. Memory loss that disrupts daily life may be a symptom of Alzheimer's or another dementia. Alzheimer's is a brain disease that causes a slow decline in memory, thinking and reasoning skills. cholinesterase inhibitors is used to treat cognitive issues in early to moderate stage Alzheimer’s.