Medicinal Action and Uses---Astringent tonic, diuretic. Agrimony has had a great reputation for curing jaundice and other liver complaints. Gerard believed in its efficacy. He says: 'A decoction of the leaves is good for them that have naughty livers': and he tells us also that Pliny called it a 'herb of princely authoritie.' Dioscorides stated that it was not only 'a remedy for them that have bad livers,' but also 'for such as are bitten with serpents.' Dr. Hill, who from 1751 to 1771 published several works on Herbal medicine, recommends 'an infusion of 6 oz. of the crown of the root in a quart of boiling water, sweetened with honey and half a pint drank three times a day,' as an effectual remedy for jaundice. It gives tone to the system and promotes assimilation of food.
Agrimony is also considered a very useful agent in skin eruptions and diseases of the blood, pimples, blotches, etc. A strong decoction of the root and leaves, sweetened with honey or sugar, has been taken successfully to cure scrofulous sores, being administered two or three times a day, in doses of a wineglassful, persistently for several months. The same decoction is also often employed in rural districts as an application to ulcers.