Everyone has parasites. What you do depends on the type of parasite you are dealing with. Microbial, intestinal, or liver flukes.
There are many anti-parasite supplements available both on-line and in retail health food stores. Look for a well balanced anti-parasitical formula that does not contain Wormwood. The FDA has issued a warning against prolonged use of Wormwood due to the possibility of liver damage.
My ideal anti-parasite supplement would contain 5 to 7 differant anti-parisitical herbs such as Black Walnut Hull, Sage Leaf, Clove, Cinnamon, Wood Betany, Pau d' Arco, and Pumpkin Seed.