Your body is out of balance and its out for a reason. Both you and the doctor are treating the symptom and not the cause. You probably have a filthy out of balance colon with poorly or partly digested food giving any parasites a banquet. Clean up the colon, check for a lack of HCL, use digestive enzymes and use Bentonite and psyllium to clean the festering putrid mess in the colon. Stop eating Sugar and stop relying on some killer wearing a white coat to help you. Get your ph in balance. No single drug or singe herbal formula will cure you but a combination things will. The parasites are there for a reason, find that reason.