Objective To assess the efficacy and safety of memantine combined with donepezil for the treatment of mental and behavior disorders(MBD)in Alzheimer's disease. Methods A total of 73 patients with Alzheimer's disease who had MBD were randomized to experimental and control groups.Patients in the experimental group received combined therapy with memantine and donepezil for 24 weeks,and those in the control group were given only donepezil.At 12 and 24weeks of treatment,the cognitive function was evaluated using...