I went from 225mg to 150mg and got brain zaps for a week or two and my heart rate went up giving me chest pain. Sometimes It would bother me so much I couldnt go to sleep because I was afraid I'd have to go to the hospital. I almost thought I was going to die once going up on Geodon because I suddenly felt depressed and very confused and my heart was racing too fast so ever since then I've kind of had a fear of it happening again. I just started taking 75mg and my chest hurts.