I was taking Effexor, that seemed to not be working well, so my psychiatrist (now ex) added Abilify. After a few months I started having thoughts that I knew weren't mine, so I stopped taking it. I didn't have any issues with weight gain, wasn't on it that long, but I did start having tremors when the dosage was raised, they went away when the dosage was put back down, then the "bad thoughts" started.