Certain drug therapies, diet modifications and herbal supplements may help treat bowel parasites, states the University of Maryland Medical Center. The two primary kinds of intestinal parasites are helminths, which are intestinal worms, and protozoa, which are single-celled organisms. Both kinds can cause digestive distress.
Once a doctor has determined the parasite, she can prescribe the medications that target it, states the University of Maryland Medical Center. Patients with intestinal parasites are advised to eat more fiber in the case of worms, take probiotics to restore healthy gut flora and avoid simple carbohydrates. They can also take garlic, barberry, anise or wormwood herbal supplements.