My son was switched from a Zyprexa and Prozac combination to risperidone and prozac. He had good results on symbyax, but one he changed healthcare providers and that combination drug was no longer available, he moved to a Zyprexa Prozac combination Zyprexa 10 mg Prozac 20 mg. He reports being on a bad trip since the change to risperidone. Panic attacks, pains in chest, irritability, thoughts of wanting out of his body, severe depression. Two trips to the gym today have helped, but he wants off all anti-psychotics.