well i dont know for sure but i lived by myself before i was diagnosed and i know that it is not easy when your not taking any meds but i think that if she is taking her meds for a long time then yes she will be fine. i had a hard time because i was alone but soon i will be married and move out from my parents house and i pray that i can make it. she just needs to know that she always has a good support system and maybe she could move somewhere nearby so if she ever needed anything you will be there but i think that she can do it as long as she takes her meds