Dover's Powder

Dover's Powder was first prescribed by Thomas Dover, M.D. (1660-1742), who in 1709, whilst captain of a privateer, took Alexander Selkirk off from Juan Fernandez. The powder is prepared by mixing powdered ipecacuanha root, 1 part; powdered opium, 1 part; and sulphate of potash, 8 parts. The whole is thoroughly mixed, and the ordinary dose is from 5 to 10 grains. Occasionally, saltpetre is added. It is a most valuable medicine, and acts as a sudorific, increasing the proportion of sweat or sensible perspiration. In feverish conditions, where there is the dry furred tongue, and the dry skin, and the brain out of order, Dover's powder is reckoned to prove injurious; but where the tongue is moist and soft, the skin moist and soft, and the brain comparatively unaffected, Dover's powder is of great service. In heartburn 3 to 4 grains will often give relief.