Infusum Cinchonae (U. S. P.)—Infusion of Cinchona.

Related entry: Cinchona wossname

SYNONYM: Acid infusion of cinchona.

Preparation.—"Cinchona, in No. 40 powder, sixty grammes (60 Gm.) [2 ozs. av., 51 grs.]; aromatic sulphuric acid, ten cubic centimeters (10 Cc.) [162♏]; water, a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Mix the acid with five hundred cubic centimeters (500 Cc.) [16 fl℥, 435♏] of water, and moisten the powder with thirty cubic centimeters (30 Cc.) [1 fl℥, 7♏] of the mixture; pack it firmly in a conical glass percolator, and gradually pour upon it, first, the remainder of the mixture, and afterward water, until the infusion measures one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]"—U. S. P.).

The Br. Pharm. directs red cinchona bark. Yellow bark is preferable for this preparation, although the U. S. P. permits any good cinchona. This preparation represents a solution of the cinchona alkaloids in the form of sulphates, and is an efficient preparation.

Action, Medical Uses, and Dosage.—(See Cinchona.) Used mostly as a tonic. Dose, 2 fluid ounces, 3 times a day.

King's American Dispensatory, 1898, was written by Harvey Wickes Felter, M.D., and John Uri Lloyd, Phr. M., Ph. D.