Antidote

(an'-te-dot). An agent preventing or counteracting the action of a poison. The official A., Arsenical, of the German Pharmacopeia is prepared by di olving IOO parts of the hydrated sulphate of iron in 250 parts of water, to which add (without heat) 15 parts of burnt magnesia and 250 parts of water. A., Chemical, changes the chemical nature of the poison so that it becomes insoluble or harmle . A., Mechanical, prevents absorption by holding the poison in mechanical suspension or by coating the stomach. A., Physiological, supplies its own peculiar and neutralizing effect upon the system. A., Universal, a mixture of one part of di olved iron sulphate in two parts of magnesia water. See Drug.