My son gained weight when we increased the risperdal this past May. 20 lbs! Alot for a little boy. But he's lost some of it through growth and exercise. Lamictal doesn't seem to have that effect on him though.
Has her psychiatrist (psychiatrist) given her a diagnosis other than "mood disorder?" I ask because knowing what kind of disorder she has makes all the difference with what kind of medication she could be taking. If she's depressed, SSRIs (i.e. Zoloft) can help, but if she's bipolar, SSRIs can make her manic. I'm so sorry that you are going through this. Did it just start recently (meaning, within the year?). It can take a while to get the combination right. It's frustrating and scary.