I agree with tzoya, definately contact your doctor. However, you ought to go to www. enzymestuff.com or join the yahoo group for enzymes and autism. Some kids do go through a sort of die off when they start an enzyme, depending on what the enzyme's purpose is. Also, some kids can't tolerate certain enzymes so it could be that he may need to switch to something else, ie Zyme Prime from Houston Nutraceuticals or another carb digestive enzyme made by Kirkmans.
Did you start anything else at the same time or change dosage of some supplements?
My son has diarrhea and tummy ache. We started giving him