Precautions

"Adults should limit use of Oregon grape root or any other herb containing berberine (barberry, coptis, or goldenseal) to seven consecutive days at a time, waiting at least a week before using the herb again. This gives the natural, helpful bacteria of the intestine a chance to recover. Taking vitamin B6 supplements can give infectious bacteria resistance to the antibacterial toxins in the herb. Do not take Oregon grape root if you are taking antibiotics for diarrhea. The herb is not a problem for nursing mothers unless the baby has jaundice, however it should not be used while pregnant."

---Both Goldenseal and oregon grape can affect good bacteria. Note that the precaution mentions to not take it for more than a week.  Both might affect good bacteria's adherence to the intestinal lining. If the berberine herbs are affecting good bacteria at the same rate of candida then it can be counter productive.  Not a good long term approach for candida.----