Tibet produces a large number of medicinal plants much prized by the medical profession in China and Mongolia, among others the Cordyceps sinensis, the Coptis teeta, Wall., and Pickorhiza kuwoa, Royle, &c. Rhubarb is also found in great quantities in eastern Tibet and Amdo; it is largely exported for European use, but does not appear to be used medicinally in the country.
Mineral waters are used medicinally at Ciechocinek in Plock and Nalgczow in Lublin.
Acetone has been employed medicinally in cases of dyspnoea.
Medicinally, gallic acid has been, and is still, largely used as an astringent, styptic and haemostatic. Gallic acid, however, does not coagulate albumen and therefore possesses no local astringent action.
When given medicinally preparations of iron have an astringent taste, and the teeth and tongue are blackened owing to the formation of sulphide of iron.