What Are The Risks After Reducing Dosage Of Risperidone, Trihexyphenidyl And Sertraline?

After 20 years on risperidone and trihexyphenidyl and sertraline, a new doctor told me that she wants to cut my trihex in half and in a month again by half. Takine 2 mg 2x day for 20 years with no hospitalizations or instability, so why is this happening. They won't explain it to me. What will I suffer if I go through with this cutback. When I was hospitalized I was told I'd be on these meds for life. I don't have medical insurance and these service providers are through my county mental health office.