Emplastrum Arnicae (U. S. P.)—Arnica Plaster.
Related entry: Arnica.—Arnica
Preparation.—"Extract of arnica root, three hundred and thirty grammes (330 Gm.) [11 ozs. av., 280 grs.]; resin plaster (contains lead), six hundred and seventy grammes (670 Gm.) [1 lb. av., 7 ozs., 277 grs.]; to make one thousand grammes (1000 Gm.) [2 lbs. av., 3 ozs., 120 grs.]. Add the extract to the plaster, previously melted by means of a water-bath, and mix them thoroughly"—(U. S. P.).
Action and Medical Uses.—A stimulant, useful as an application to painful or sprained joints, chronic rheumatic pains, weak back, etc.
King's American Dispensatory, 1898, was written by Harvey Wickes Felter, M.D., and John Uri Lloyd, Phr. M., Ph. D.