No the only thing that's changed in my life is the dosage
Did you change whether you took it with food or not? I don't know about risperdal specifically, but some meds can make you more nauseous when taken without food. Side effects usually crop up quickly, though, so it could be something else.
I have used this med, breifly, once. It made me dizzy and feeling 'drugged', so i complained to my doc, and he told me to take it before bed, and that worked. Since then, I have been taken off of this med, and replaced it with others that work better. Blessings - Blu