Dear Jane-
I know it must be difficult for you. Schizophrenia is a very difficult disorder to deal with. I think that much about it is still not known or at least not really acknowledged. I hope you can find some detachment. I am sure your mom does love you and that you love her too.
I don't know if this helps at all but I do know that the meds for the condition you describe make the person feel bad it usually makes their stomach hurt and other body stuff too. I can understand why they do not want to take it. It seems that a lot of what makes them not want to take it could be eliminated if a better system of delivery could be found.
There needs to be smaller dosages that are delivered more directly to the brain where the imbalance is...