The document discusses goldenseal (Hydrastis canadensis), a perennial herb used medicinally. It describes goldenseal's botanical origin, chemical constituents including berberine, uses such as treating infections and promoting healing, side effects like hypoglycemia, contraindications like pregnancy, and drug interactions with cyclosporine and liver-metabolized medications. Goldenseal is used as an anti-fungal, anti-catarrhal, and anti-diabetic, but its use is often recommended for short-term treatment only.