Even ice cream symptoms and conditions

My Dad's doctor put him on this. Before he was put on it he was up walking around and saying a few words, laughing with us. Now he is in a wheelchair and not eating. My dad has Alztimers (?) so he don't talk much anyways but we have notice that he don't like to eat anymore not even ice cream that he use to love daily. His urine is brownish with a little red in it. My dad can't speak for himself to tell us what hurts or what's wrong with him but my Mom and I can that something is wrong.
This medication is awful I wouldn't say anything nice about it.