can wild oregano be used in between cleanses?

RG,

My mom as you know has thyroid cancer and she is taking the Humaworm and doing the liver flushing. She finished her Humaworm at the end of December and just did another liver flush. She wants to take her wild oregano which also has garlic and onion in it. It is called Oregamax and is wild Oregano from the meditraians. Will the wild Oregano create resistant parasites? She seems to think that the wild oregano helps her keep her blood sugar levels down and helps with her digestive track when not on the humaworm cleanse. I don't want her to get resistant parasites so I will have her hold off until I hear your answer. Donna