The drugs can't kill the eggs, so they seem useless in the control of parasites and the damage they can do to the liver only makes the body more acceptable to more parasites!
Fruits and vegetables eaten raw, unmixed is 98% of the cure! But with parasites, once you have them well established, they don't want to die and they love your flesh, so fruits/vegetables don't usually eliminate them and can actually promote them if they are less than natural fruits.
I like the standard herbs used for deworming, the flushes, orange juice fasting and I never do it perfect, so I need to fast once or twice a year. "IF" you obey the laws and eat raw fruits ONLY, then once clean, you don't need to ever fast again.
Please read the web site, don't miss the herbs page on the farm; there you see the dewormer herbs, etc. The web site is under construction, but still lots to read for free.