Syn. Tartar Emetic.

For a full account of this antimonial, the reader is referred to page 56 of this volume. As an expectorant, it is on the whole the most efficient belonging to this subdivision. it operates not only through its sympathetic nauseating influence in relaxing the excited bronchial vessels, but also by a depressing effect upon them, through its influence as an arterial sedative, while it stimulates the secretory cells vigorously by its immediate presence either unchanged, or in a modified state. it thus at the same time reduces the capillary circulation to the secreting point, and promotes directly the secretory function.

As an expectorant, it is employed chiefly in acute inflammation of the air-passages, or pulmonary tissue, whether original or associated with other diseases; but it is occasionally used also, in conjunction with the stimulant expectorants, especially squill and seneka, in chronic inflammation of the same parts. it should always be used with great caution, in cases complicated with gastric or intestinal irritation or inflammation, or occurring in a low typhoid state of system. in infants, too, its use requires much care, in consequence of its tendency to irritate the bowels. I have known convulsions repeatedly occasioned in infants by small doses of tartar emetic, in consequence of the violent intestinal spasm induced by it. in all such cases, ipecacuanha should be preferred.