How about reducing the amount you take? A friend who was (and still is) on an antipsychotic was a total veg until his dose was reduced. Now he is much more alive in spirit, and able to experience his emotions at a more normal level. It made an incredible difference!

If the drug you are on works well for you and there are no other icky side effects, changing may not be such a great idea, unless of course, you have already tried reducing.