This is a very prompt and efficient emetic. The action begins in a few minutes, and the medicine comes up with the vomited matters. Very little depression follows the emetic action. It is more especially adapted to the treatment of narcotic poisoning, because, the action being local, the obtunded state of the reflex centers interferes less with its operation than is the case with the systemic emetics; and to phosphorus poisoning, because of its antidotal power. It is also occasionally used in croup, to effect the dislodgment of the false membrane, but other mechanical emetics are preferable.

Administration

Dissolve twenty grains of the sulphate of copper in two ounces of distilled water, and give a table-spoonful every fifteen minutes until vomiting occurs. When prompt action is required, as in narcotic poisoning, ten grains of the sulphate of copper may be given at a draught in an ounce or two of water. Its action should be assisted by the free use of diluents.