I have found the parasite testing to be completely useless. I was sick with them for over a year and a half and am still working on getting rid of them despite the fact that my tests came up negative.
The product I started with is called Wormwood Complex and it's from Standard Process. I passed worms within days of taking this. It's quite pricey however so after taking Mebendazole (medication) I am now doing my own herbs. I order from Pacific Botanicals and get sweet annie(wormwood), Black-Walnut powder, and cloves. These are the three main parasite cleansing herbs.
After my second round of meds I noticed a dramatic increase in my energy.
If you're not sure if you have parasites you could just start with the herbs. Cloves are also good for inflammation and candida. Black-Walnut is a good for various infections. Wormwood is also good for lyme coinfections.