Lamotrigine
"I've been on this medication for 1 year or even 2 years with 300 mg. I still have extreme mood swings and it doesn't help at all, I want lithium or other bipolar medicine - this doesn't work at all for me. 

I'm really scared to gain weight while on some other medication because I already gained 20 kg from an antipsychotic medicine before but I can live with this. My bipolar illness gets worse and worse I still have a good medicine "base" tho. It's not as extreme as a couple of years ago but I'm only 19 years old so I'm looking forward trying something else."