Well anti parasitics tend to paralyze them and then they die. Herbals can made them scatter outside of the digestive track. It becomes a particular problem if they are strongyloides.
I think we are in this parasitosis mess because no one wants to go public letting people know they suffer with parasites. So no one fights for the right to be treated the way people with other diseases are treated. They just want to treat us disrespectfully and they get away with it. They don't mind that a percentage of people die for some reason. They treat all parasites the same - unimportant.