<qa>  What is the target dose of risperidone?The goal of this study is to compare two standard therapies for the management of agitation symptoms in dementia patients. Subjects in this study will include patients who are admitted to the Wesley Woods Inpatient service for the treatment for dementia complicated by behavioral symptoms. After a patient reaches the target dose of risperidone up to 1.5 mgday, quetiapine up to 175 mgday, or olanzapine up to 7.5 mgday and agitation symptoms are still not adequately managed, he or she will be randomized to one of two groups. Group 1 participants will continue to receive increasing doses of antipsychotic medication until symptoms are controlled or he or she is unable to tolerate the dose. Group 2 participants will continue to receive the target dose of antipsychotic medication and also receive increasing doses of divalproex until symptoms are controlled or he or she is unable to tolerate the dose. Patients will be evaluated at 4 time points during hospitalization. Patients will be evaluated using scales that measure changes in cognition, function, and behavior. Laboratory and ECG results, and scales testing for movement disorders will be done to monitor safety. The family will then be contacted about 3 months the patients hospitalization to assess current treatment status, residential status, and health status. 