Quebracho, known scientifically as Aspidosperma quebracho-blanco, is a member of the Apocynaceae family. The bark of the plant can be used for medicinal purposes. Quebracho contains indole alkaloids and tannins. It has folk and homeopathic uses. Quebracho has been used for stimulant, diuretic, and expectorant activities. Quebracho has been used for the lower respiratory tract, asthma, bronchitis, and breathing difficulties.