A Double-blind, Placebo-controlled Comparative Study and Open-label Extension Study to Confirm the Efficacy and Safety of E2020 in Subjects With Down Syndrome Having Regression Symptoms and Disabled Activities of Daily Living.
Conditions
Interventions
- DRUG: E2020-Donepezil hydrochloride
- DRUG: E2020-Donepezil hydrochloride
- DRUG: Placebo
Sponsor
Eisai Co., Ltd.