Aricept has already been stopped. Was wondering does anyone have any ideas on the mementine. Maybe its my imagination but since his meds were cut back and he does not like taking too many at one time I started giving him his second dose of memantine at 1600 in the afternoon, I have found his mood changes afterwards and he becomes quite moody. Don't know if its just to do with the time of day or the medication. He has been on this tablet for about 3 years now. Any ideas......