An extract is made from the leaves, which possesses strong tonic properties, and which renders great service in rheumatism, scurvy, and skin diseases.

Tonic, cathartic, deobstruent and febrifuge. An extract is made from the leaves, which possesses strong tonic properties, and which renders great service in rheumatism, scurvy, and skin diseases. An infusion of 1 OZ. of the dried leaves to 1 pint of boiling water is taken in wineglassful doses, frequently repeated. It has also been recommended as an external application for dissolving glandular swellings. Finely powdered Buckbean leaves have been employed as a remedy for ague, being said to effect a cure when other means fail. In large doses, the powder is also purgative. It is used also as a herb tobacco.

Maud Grieve, Modern Herbal Vol 1 (1931)