GAL and Alzheimer disease: As regards cognitive functions, in mild-moderate AD all drugs (DON, GAL, and RIV), except for RIV 5-cm2 patch, were significantly more efficacious than placebo, with a probability to be the best choice to enhance cognitive performance GAL 32 mg > GAL 24 mg > DON 10 mg > RIV 15-cm2 patch.