How To Use Barberry Bark (Berberis vulgaris)
Decoction: Half a 1 teaspoon to 1 (1 to 2 g) of herb to a cup of cold water, bring to the boil and leave to sit for 15 minutes. Or steep 1 teaspoon bark in cold water overnight. Flavour with lemon, ginger or honey if desired. Drink 3 times a day unless otherwise told by a medical herbalist.