Risperdal didn't make me lactate, but I'm sure if I stayed on it longer, what with the prolactin/hormone stuff, I would have lactated too. I was only on it for 3 weeks and it gave me the worst acne of my remembered life. I didn't even want to go outside and used a half a bottle of concealer just so I didn't shock people with my sudden transformation. Now, 3 weeks later, my face has mostly cleared up. I'm on Zyprexa and so far no probs or weight gain. Lamictal messes with your hormones too, but it hasn't caused me any probs since I came off of birth control.