Which antipsychotic bipolar drug has the least side effects that is the most effective?

Side effects vary immensely from person to person, so saying which has the least side effects for you is not really something anyone can say. My experience with Abilify has been pretty good, but I would only recommend it if you have insurance. It's really expensive. Give the Zyprexa a while to see if it works and keep an open conversation with your doctor about how you're feeling and what seems to be working. Good luck.