Root traditionally used in tea or tincture to treat inflamed mucous membranes of mouth, throat, digestive system, uterus; also used for jaundice, bronchitis, pharyngitis, gonorrhea. Tea (wash) a folk remedy for eye infections. Contains berberine, an antibacterial that increases bile secretion and acts as an anticonvulsant; experimentally lowers blood pressure, acts as a mild sedative.
CAUTION: Do not use large amounts during pregnancy. When used over a long time, golden seal may interfere with vitamin B absorption. Scientists have disproved rumour that Goldenseal masks morphine in urine tests.