Here are the best products against parasites I've seen in action.
1. Doxycycline - A very effective anti-parasite drug, usually given in a single dose. It has a very good safety profile, but only works as a parasite treatment for about 8 hours, and then it does not help. There have been reports of serious side effects (including the liver failure) with the use of the drug.
2. Sulfur - A very effective treatment against parasites, although it's not as effective as the one above.
3. Oxitec - This treatment can be used for up to three years, with the last time being when a person is actually infected by a parasite. Once the treatment is over, the patient will have to abstain from any food or water for a long period of time. This is a very long course of treatment and can even be difficult to recover from. It should also be remembered that some of the parasites are quite small and it takes a few days for them to grow back, while the parasite that was removed in the initial treatment can live for several months. Sulfur is very effective against certain types of malaria parasites, such as the ones that can cause yellow fever, dengue, chikungunya, toxoplasmosis, and other diseases.