I've been on it for about 2 months, now on 200mg AM, and 200mg PM, and have not gained weight. I tihnk if anything, my appetite has decreased. I do feel bloated sometimes though.

I was on 200mg, and from Friday (5 days ago) I went up to 400mg. I found my mood was terribly unstable on 200mg (I don't know if it got worse as I started the meds.