Parasites are a wide spectrum, meaning there is seldom a one size fits all treatment. Protozoa are quite diverse. There are a number of meds that could treat these and oftentimes you have to find the right combination. Cocktails seem to work better meaning using more than 1 med. Badbugs.org has testimonies of different combinations.
Common protozoa meds include Flagyl, its cousins Tinidazole, secdinazole. Alinia, paromomycin, ivermectin, doxycycline, Septra, albendazole and others.
Protozoa will suck the life right out of you causing massive fatigue. They evoke strong immune reactions that effect neurological, endocrine and many other functions.
You can read stories at pptu.lefora with good treatments at the subthread ehisto/Dr. Cahill.
There are some natural treatments that I can give you details if you like.