Trochisci Acidi Tannici (U. S. P.)—Troches of Tannic Acid.
Preparation.—"Tannic acid, six grammes (6 Gm.) [93 grs.]; sugar, in fine powder, sixty-five grammes (65 Gm.) [2 ozs. av., 128 grs.]; tragacanth, in fine powder, two grammes (2 Gm.) [31 grs.]; stronger orange-flower water, a sufficient quantity to make 100 troches. Rub the powders together until they are thoroughly mixed; then, with stronger orange-flower water, form a mass, to be divided into 100 troches"—(U. S. P.). Nearly 1 grain of the acid is contained in each troche.
Action and Medical Uses.—(See Acidum Tannicum.)