I was diagnosed as bipolar type 2 back in June 2005, and since then have been on Lamotrigine
(Lamictal) on an increasing dosage. I have been at the max dosage that my doctor said is allowed (350 mg/day). So that means over 4 years that I've been taking this drug.
I have found that since taking lamictal, my depression has all but vanished, but it does not control my manic behavior at all. So as an anti-depressant, I think it's very effective for me.