B. P., not official. Synonym. - Red Gum. A ruby-colored exudation from the bark of Eucalyptus rostrata (nat. ord. Myrtaceae) and from other species.

Habitat

Australia.

Characters

An inspissated secretion forming semi-translucent and garnet-colored grains or small masses. Tough and difficult to powder. Adheres to the teeth when chewed. Taste very astringent Soluble in water. Resembling Eucalyptus Gum. - Kino, which is darker and feebly soluble in water.

Composition

The chief constituents are - (1) Kinotannic Acid. (2) Catechin. (3) Pyrocatechin.

Dose, 2 to 10 gr.; .12 to .60 gm. in powder, or in an aqueous solution or made into a pill with mucilage of Acacia.

Action And Therapeutics Of Red Gum

Red gum is, by virtue of its tannic acid, powerfully astringent and is used in diarrhoea and dysentery. Lozenges, 1 gr. .06 gm. in each, with fruit paste, or a decoction of 1 in 40, as a gargle, are employed for relaxed throats. This decoction may also be given in 2 to 4 ft. dr. 8. to 15. c.c. doses for diarrhoea. A fluid extract (red gum, 7; water, 21; alcohol, 1;) dose, 1/2 to 1 fl. dr. 2. to 4. c.c. is a useful preparation. Injected into the nose it stops epistaxis. Mixed with 1 to 10 of water it may be injected into the rectum or vagina, or may be used as a mouth wash. Suppositories, each containing 5 gr.; .30 gm. of red gum, are prepared, and may be employed for piles.