Suggest Treatment For Schizophrenia

hi my mother aged 55 has been suffering from schizophrenia for 2yrs. we couldnt recognize the symptoms earlier and it was difficult to take to her to a doctor. now she is on medication since a yr.but since 2 weeks she is not taking food properly, skipping during nite and hence skipping her night medications,her diabetic medications also, and is not interesting in talking to us on phone also...we are concerned about her as my dad is the one who is taking care of her,without any other help,as we stay away from them.can you suggest what to do, does counselling help her to improve?or change of medications? plz sugest the kind of treatment she needs. Thank you.