As ar as drugs are concerned, I never found anything that helped Mom. Drugs for AD currently available are Namenda and Aricept; neither did a thing for my Mom and we stopped them because of digestive side effects.
Other drugs are often used in treatment but they are sleeping pills or tranquilizers to work against night wandering (sundowning), anti anxiety drugs to help reduce violent attacks of fear, anxiety, endless screaming and crying.
After 5 years of at home care for Mom, she did wind up in an excellent nursing home for the final 2.5 years of her life. She was cared for very well there. My brother and I were amazed. After all our guilt feelings about not being able to care for her at home any longer, she was happier there. Group activities, around the clock care, no decisions to make (even trying to figure out how to take a shower, and what clothes to put on, became frustrating obstacles to her normally happy life!), her hair was combed, her teeth brushed, she was sppon fed when she didn't seem interested in her dinner, a doctor examined her weekly, nurses watched for any signs of trouble. It was an amazing relief to the family and an improvement in her quality of life (this contradicted everything I had ever believed about nursing homes!)
Good luck in your decision making.
Love,
Martha