Well some herbal remedies are very potent and going all natural would be best, the only thing is these parasites aren't all natural! They are harder to get rid of due to steroids, Antibiotics , hormones, excess sugar, etc... that's made it's way into us either directly or through our food and water supply.
So use whatever is at your disposal, whether it's herbal, pharmaceutical, electrical or from the feedstore! They do scatter, cause their running for their lives!
If you ever can afford one, a Rife machine is worth it's weight in gold. My case is more than just bigger parasites, I've got a number of viruses and also a couple pneumoniae. It has made a world of difference.