MJMJ, I wouldnt totally stop with herbal remedies. Most don't have ill side effects, nor kill the good bacteria along with the harmful bacteria-- nor do they cause resistant strains of bad bacteria, viruses, etc. down the road.
I would also explore certain medications such as the one mentioned at the beginning of this thread and others also. But never toss out the herbal alternative choices, because if they dont' cure certain conditions, they do enhance effectiveness of other forms of treatments, and many do help the body and have anti- parasite properties to boot.