Twenty-four week, prospective, randomized, double-blind, placebo-controlled, parallel-group study.

Donepezil Hydrochloride (E2020) in Dementia Associated With Cerebrovascular Disease

A 24-Week, Multi-Center, Randomized, Double-Blind, Placebo-Controlled Evaluation of the Efficacy, Safety and Tolerability of Donepezil Hydrochloride (E2020) in Patients With Dementia Associated With Cerebrovascular Disease

Using a new formulation of rifaximin, a non-absorbable antibiotic, to test if it can affect microbes in the gut of patients with dementia favorably.