i had the same issue while taking Risperdal, and also the newer Invega - which is really just the active ingredient in Risperdal and just absorbed in your body in a different way. While on Invega, my cup size went up one size and never returned. because of some of my history, i will never personally never take either one of these meds again. makes me too uncomfortable.

but yes, i'm strongly guessing it's the Risperdal.