I started taking Lamotrigine 150mg, manufactured by Northstar, at the beginning of 2011. My pharmacist informed me that Northstar no longer manufactures the pill. The new brand they have given me is Lamotrigine 150mg manufactured by Cadista. It has been a week and I have noticed an increase of mood instability. Instead of being level emotionally, I'm experiencing hyperactive moods for a few days and for a few days, depressions. I'm am very concerned about this because I have been doing very well stability wise and I don't want to take ten steps back, putting my return to school at risk. I don't know what to do.