I've had much success with herbs and am very grateful that they are accessible (so far) over the counter.
One must also keep in mind that when treating yourself with either drugs or herbs, a person needs to get to the root cause of why they're body became a home for parasites in the first place. Its up to each human to live a healthy lifestyle and eat only nutritional non toxic foods to build up the immune system to withstand invading microbes or parasite larvea.
Treating the cause is one thing- - and thank God that there are herbs one can educate themselves on and use for various purposes- but it is a waste of time if one joins the crowds and lives a toxic life with a toxic diet.
I reccomend visiting www.bragg.com -- and getting the book, "Bragg healthy Lifestyle: Vital Living to 120!"