I didn't notice my breasts growing, but I was on The Pill and that can happen. I'm on Risperidone, and my boobs have grown. I attributed that to weight gain (gotta get my weight in check!), but once my pdoc told me the Risperidone could do that, I figured that's why I'm now in D and double-D bras! (I need to get a bra fitting and find out exactly what my size is.) I also lactate a tiny bit, also a symptom of Risperidone.