DEFINITELY have your friend back off and go slower with the parasite herbs. I am battling candida and I have experienced the brutal die off she is and if she is ill then it is too much for her body.
She can get the same benefit while going slower. Having that strong of detox is too hard on her liver, her body and her emotions. She is stirring up more toxins than her body can get rid of and they are reabsorbing.