Pefrakehl is part of a homeopathic remedy, called Pleomorphism.
Pleomorphism is an alternative theory of medicine, big in Europe, based on the idea that pathogens in the body "morph" thru different phases; from protit(?) to germ to fungus, etc. Candida is one of the fungal forms. These forms can be seen under a darkfield microscope.
The treatment encourages the fungal form to revert to earlier stages, where they are helpful to the body, not hurtful.
This is probably very inaccurately explained, but there are many good sources on the net. Just search for pleomorphism or sanum treatments.
I've been on Sanum treatments for a month or so, and it's been moderately successful.
I asked about it on this site a couple of days ago and had no response, so I guess no one else has tried it.