I completely understand your worries. I read a book on how to prevent alzheimers after the doctors put him on medication that increases the risk of alzheimers. I was determined to prevent it if we could, so started looking at diet and lifestyle measures to reduce his risk. I'm sorry your husband has seen some decline. I can have a look for the book I was reading, if you like. It was very good. He came off the meds because they weren't helping his back anyway. I was relieved. :)