SerpentariAe Radix. The root of Aristo-lochia Serpentaria. Virginian Snake-root. Nat. Ord. Aristolochiaceae. Linn. Syst. Gynandria Hexandria. Source, United States.

Med. Prop. and Action. Stimulant, tonic, and diaphoretic. It is best given in infusion or in tincture. In large doses, it causes nausea, griping with watery stools, headache, and disturbance of the cerebral functions, with greatly increased arterial action. Active principles: 1, a volatile oil; 2, a resin; 3, a bitter extractive. It is contra-indicated in acute inflammatory affections occurring in plethoric subjects.

Offic. Prep. 1. Infusum SerpentariAe (Serpentary oz. 1/4; Boiling Distilled Water fl. oz. x. Infuse for two hours, and strain). Dose, fl. oz. j. - fl. oz. ij.

2. Tinctura Cinchonae Composita

(See Cinchona.)

3. Tinctura Serpentariae (Serpentary Bruised Oz

iiss.; Proof Spirit Oj. Prepared by maceration and percolation). Dose, fl. drm. ss. - fl. drs. ij.

Dose of Serpentary, gr. x. - gr. xxx.

2494. Therapeutic Uses

In Hydrophobia and the Bite of the Rattlesnake, it was formerly held in high repute, but it does not appear to have sustained its character, and is now rarely employed. (See Aristolochia Indica.)

2495. In Typhus and Typhoid Fever, Serpentaria is occasionally administered, with a view of exciting diaphoresis, and supporting the powers of the system. Cullen speaks favourably of its efficacy; and Dr. Nevins* states that it is extensively used at Guy's Hospital.

* Clin. Lect., vol. ii. p. 525.

2496. In Intermittent Fevers, It Was Advised By Sydenham, In J

doses. It does not appear to possess much power when given alone, but may be advantageously combined with other anti-periodics.

2497. In Dyspepsia, when the skin is hot and dry, Serpentaria has been found an excellent remedy. (A. T. Thompson.)

2498. In Cynanche Maligna, A Strong Infusion Is Stated To Form An Eligible Gargle

2499. In Urticaria, Serpentaria Has Obtained Some Repute; It May Be Combined With J

of the Carbonate of Magnesia or Soda. (Dr. Watson.) Mr. Erasmus Wilson mentions one case in which it proved completely successful.