My mom is 87 has moderate dementia and has been given 5mg of Namenda twice daily. Now they have increased to 20mg. She has is now experiencing the following since increase: itching, stupor, vomiting, confusion,x back pain seeing, hearing things that are not there, anxiety, indigestion.....her quality of life has gone down hill within a week of taking increased dosage. I am thinking of taking her off this med because she is not the same Mom. Is it worth sticking it out or giving her some peace as she knows it?