Alzheimer's disease (AD) was investigated in a multicenter, double-blind study. Patients
were randomly assigned to treatment with placebo (n= 162), 5 mg/d donepezil (n= 154), or
10 mg/d donepezil (n= 157) for 24 weeks followed by a 6-week, single-blind placebo
washout. The primary efficacy measures were the cognitive portion of the Alzheimer's
Disease Assessment Scale (ADAS-cog) and the Clinician's Interview Based Assessment of …