I heard voices calling my name when I was on a high dose of Prozac (and lots of sleep instability). It was one of the scariest non-trauma experiences ever. I immediately got a change of meds and haven't really had an issue with hallucination since.

Unless the little things you see out of the corner of your eye count - like motion when there's nothing there. Or the little "floaters" that seem to slowly drift through my field of vision on occasion. I've always believed that was normal (but if it's not, how would I know?)