Parstroy IS stonger so you'd be likely to feel the effects more. Lower the dose a bit and see about cleansing your colon - when things are stirred up so that you feel sick, the first line of defense and very best cure is an enema/colonic. If you don't have your own enema setup yet, consider doing a salt water flush, but wait until 6 hours after last meal preferably. a detox bath afterwards is a good thing too. Start drinking plenty of fluids too, either the rehydrating drink or cleansing drink.

Hope that helps!