Tonga. - The bark of Raphidorphora vitiensis (nat. ord. Araceae) and Premna taitensis (nat. ord. Verbenaceae).

Habitat

Fiji Islands.

Composition

The chief constituents are - (1) Tongine, a volatile alkaloid. (2) A volatile oil.

Dose, 1/4 to 1 dr.; 1. to 4. gm.

Action And Therapeutics Of Tonga

Tonga as a fluid extract; dose, 1/4 to 1 fl. dr.; 1. to 4. c.c., undoubtedly relieves some cases of intractable neuralgia. Combined with salicylates it is of great value for the treatment of so-called muscular rheumatism. In large doses it is purgative.