Epitome of the Pharmacopeia of the United States and the National Formulary / With Comments

by Albion Walter Hewlett; William August Puckner; Torald Hermann Sollmann; Martin I. Wilbert

A heavy, odorless, brownish-black powder with a metallic taste. Only slightly soluble in water; insoluble in alcohol.

Action and Uses: Astringent in gastric ulcer. Probably inefficient.

Dosage: 0.06 Gm. or 1 grain (U.S.P.).

Arnica (Arnic.), Arnica, U.S.P. (Arnica Flowers).

Action and Uses: Feeble rubefacient. Still used externally to some extent in the form of a tincture mixed with water as an evaporating lotion. The chief active ingredient of the tincture is probably its alcohol.

Fluidextractum Arnicae (Fldext. Arnic.), Fluidextract of Arnica, N.F.—Arnica (100%). Absolute alcohol content about 40 per cent.

Tinctura Arnicae (Tr. Arnic.), Tincture of Arnica, U.S.P.—Arnica (20%) in diluted alcohol. Absolute alcohol content about 46 per cent.

Arseni Iodidum (Arsen. Iod.), Arsenous Iodide, U.S.P. (Arsenic Iodide).—AsI₃.

An orange-red, odorless powder. Soluble in water (1:12) with partial decomposition; soluble in alcohol.

Action and Uses: Similar to those of arsenic trioxide, over which it has no advantage.