One of the medicines that promote sleep. It is less powerful than opium, although a very large amount of it taken will poison fatally. It is a white crystalline substance, of a pungent taste and color.

Dose, from ten to thirty grains for an adult; for a child, one grain for each year of its age. It should betaken or given only as prescribed by a physician; and when so advised, left off as soon as his judgment will allow. The same sort of danger attends its use as does that of opium, of forming a chloral habit, depending upon it for sleep, and requiring larger and larger doses, with at last great injury to the health.