No need to spend a lot of money for liver flushing. If you go to the pharmacy and ask for simple magnesium sulphate it will only cost you a couple of pounds. You may be magnesium deficient, like most people, this is why you haven't experienced a purge during your flush. The fact that you killed parasites for four weeks could mean that you have all the dead bugs in the liver that need to be flushed out first. Their toxins can make your life a living hell until you get them all out. I would say, try again in a couple of weeks and get the dead worms out of your liver and then you'll feel better.