Artemesia. Several anti-parasite medicines have been derived from the active ingredient in artemesia (wormword) - this herb may be effective to prevent chronic infection with parasites when traveling or in treating active disease. You should not use without physician supervision, however, as artemesia is a powerful pro-oxidant and may cause problems if used long-term. Often medications are needed.
Interesting ? I have heard from lots of people that garlic (not sure how much and what way) can be used but better off is raw pumpkin seeds (peeled). I've been advised to use 1/2 glass (~75 grams) once. Not sure if those work or not, but that's what i've heard of.