My father in law s dr started him on 5mg of Donepezil in Aug 2016, once daily. symptoms of forgetfulness did not slow down, but seemed to speed up. So in Dec, his dr added 5 mg of Memantine 2x daily. The patient still seems to be more and more forgetful. He is living with us now, as he cannot complete ADL s at all without constant coaching. I am just inclined to take him off of these two medicines. is it harmful to the patient in any way to just stop those meds? YYYY@YYYY . PLEASE, I only want a response from you. I DO NOT want my email address shared with ANY other companies. Just by asking a question, I am not giving your the authority to give my email address to anyone or to receive ANY emails from you other than receiving a response to my question.