I live with my mother that has a lot of health issues she cannot live alone can I leaglly have guardianship over her.

My mother cannot live alone I reside in the same home with her I would like to know if I can have guardianship over her and be able to claim her as a dependent to help with medical expenses and living expenses. She has a monthly social security check and a small pension check. She is 80 years old. She cannot remember to take her medication or after she eats within 20 min. she is ready to eat again. She has to have someone with her all the time. Any suggestions would be appreciated.