Safety and Efficacy of Donepezil in Mild to Moderate Alzheimer's Disease

Eligible patients were treated with Aricept® 10 mg/day for 20 weeks of study period. Aricept® should be taken at night, just prior to sleeping. If patient cannot endure 10mg/d，the dose could be reduce to 5mg/d for 4 weeks and then increase back to 10mg/d. Patients who could not endure the 10mg/d titration the 2nd time and were put back to 5mg/d or discontinuance of Aricept® should be considered as withdrawal from the study. There were a visit (visit 1) at week 0, the end of week 4 (visit 2) and the end of week 20 (visit 3), respectively.