Galangal, the root of an unknown Chinese plant, probably belonging to the ginger family. Two kinds, the larger (Alpinia galanga) and smaller, are described. It resembles ginger in many respects, and is but little employed in medicine, but occasionally forms an ingredient in some quack formula, or is peddled under some assumed name as a specific for diarrhoea, cholera, etc. It contains a volatile oil, a resin, and various extractive matters. The only active principles are the oil and resin. It was known to the Greeks and Arabians, and its aromatic and stimulant properties led at one time to its extensive use. Recently discovered agents of similar action but more agreeable taste have superseded it. It may be given in substance or infusion. The dose of the former is about 20 grains; of the latter, two or three fluid ounces.