I reached the 200 mgs. theraputic dose of Lamictal and felt "normal" for about 12 days. Then I had one day of hypomania and started to drift downward from normal. P-doc increased Lamictal to 300 mgs. He discussed adding an anti-depressant and mentioned several--Lexapro, Abilify, Topamax, Prozac, etc. but said he would first prefer to see how I responded to the Lamictal increase. I agreed. Several years ago I took Topamax and I felt doped. For me, Abilify was like a placebo. I don't remember much about Prozac and I never took Lexapro. Based on my experience with many SSRI's over the years, they seemed ineffective for me though I never took one in conjunction with Lamictal. I am really concerned about weight gain. I am already 20 lbs. over due to 6 months of depression related eating. If I have to add an anti-depressant to the mix which would be most weight-neutral?