> Does that mean that if Risperdal works for you but makes you gain a lot of weight, you're not allowed to try other meds?

Who is "allowing" or not allowing you? Are you under the control of someone? I think in the US, at least, the idea of the client having a lot of input to his or her own treatment has become quite common. It is, after all, YOUR treatment. See if your doctor will discuss it with you.

> My therapist... lets me understand that psychosis will never end.

If you have looked into some of the messages from spiritual_emergency, you will see that there are now mental health practitioners that do not agree with that kind of prediction, and that a number of people so diagnosed have recovered, in their own judgements -- see the "Schizophrenia & Recovery..." thread.