Made of ipecacuanha, opium, and a cooling salt (sulphate of potassium, or some similar compound), this medicine is composing and diaphoretic. Some persons find it agree with them at the beginning of a severe cold, taking it just before going to bed, after a warm mustard foot-bath. Dose, ten grains; containing one grain of opium and one grain of ipecacuanha. As this is a full regular dose of opium, it needs to be slept, as well as sweated, off. Better not take Dover's powder without the advice of a physician; at least the first time.