"All parts of the plant, but especially the root, are anti-inflammatory, antiseptic, aromatic, astringent, diaphoretic, febrifuge, stomachic, styptic and tonic[4, 9, 21, 165, 238]. An infusion is taken internally in the treatment of diarrhoea, intestinal disorders, stomach upsets, irritable bowel syndrome and liver disorders, it is also applied externally as a wash to haemorrhoids, vaginal discharges etc[238, 254] and to treat various skin afflictions - it is said to remove spots, freckles and eruptions from the face[4, 9]. The root is best harvested in the spring, since at this time it is most fragrant. Much of the fragrance can be lost on drying, so the root should be dried with great care then stored in a cool dry place in an airtight container, being sliced and powdered only when required for use. The powdered root had a great reputation as a substitute for quinine in the treatment of intermittent fevers "
- PFAF References