Oxide of Antimony. Teroxide of Antimony. SbO,. Insoluble in water, but pretty readily dissolved by weak acids. In the stomach it is probably converted into a salt, and absorbed into the system. It is the active ingredient in the following officinal preparation.

Pulvis Antimonialis. Antimonial Powder. A mixture of Oxide of Antimony oz. j.; Precipitated Phosphate of Lime oz. ij.

* Bull. Gen. de Therap. Jan. 30, 1862.

Brit and For. Med. Chir. Rev. July 1862.

Med. Prop. and Action. Nauseant and diaphoretic in febrile conditions, alterative in chronic diseases of the skin. The action of Oxide of Antimony is he same as that of Tartar Emetic, except that its effects are modified by its inferior solubility, slowly acted on by the fluids of the stomach, the Oxide is believed to be less irritating, less sudden, and more lasting in its effects than the Tartrate.* The Pulvis Antimonialis (Ph. Brit.) is intended to supersede the secret remedy known as Pulvis Jacobi Verus, James's Powder, and the Com-pound Antimonial Powder of the Pharm. Lond. These two latter preparations are both uncertain in their action, owing to the variable quantity of Teroxide of Antimony, and of insoluble Antimonious Acid, SbO4, they contain. Large I quantities of James's Powder and the Compound Antimonial Powder (Ph. Lund.) have been given without producing sensible effects. Dr. Elliotson found 120 grains of the latter nearly inert. On the other hand, in five-grain loses, James's Powder has produced copious vomiting and purging. The [mode of preparation of the Pulvis Antimonin lis, (Ph. Brit) precludes any possibility of variation in the proportion of the soluble oxide. The Oxide of Antimony is well adapted for administration in powder or pill. In the Pulvis Antinonialis, the Phosphate of Lime is insoluble and probably inert.

Dose, Oxide of Antimony gr. j. - v. Pulvis Antimonialis gr. iij. - xv.