My husband was put on Namenda 3 days ago. Yesterday he fell in the shower and had to be helped by EMS. The shower is for the disabled and has the chair the grab bars etc. but still he fell. Could the new medicine have been the cause by making him dizzy etc? I am afraid for his safety every time I leave the room. I am 5'2 and he is 6' and 230 lbs.What can I do to make hm safer . We live alone.