A white, odorless powder. Slightly soluble in water (1:455), but freely soluble in alcohol (1:2).

Action and Uses: Atropine and the related alkaloids paralyze the parasympathetic endings. They are used especially as mydriatics and cycloplegics, to suppress secretions, as in gastric hyperacidity, and to quicken the heart, regulate peristalsis, lessen bronchial spasm, etc.

Dosage: 0.5 mg. or 1/120 grain (U.S.P.).

Oleatum Atropinae (Oleat. Atrop.), Oleate of Atropine, N.F.—Atropine (2%), in alcohol, oleic acid and olive oil.

*Atropinae Sulphas (Atrop. Sulph.), Atropine Sulphate, U.S.P.

White, odorless powder. Very soluble in water (1:0.4) and in alcohol (1:5).

Dosage: 0.5 mg. or 1/120 grain (U.S.P.).

Aurantii Amari Cortex (Aurant. Amar. Cort.), Bitter Orange Peel, U.S.P.

Action and Uses: Aromatic bitter stomachic, used principally as a flavoring.

Fluidextractum Aurantii Amari (Fldext. Aurant. Amar.), Fluidextract of Bitter Orange Peel, U.S.P.—Bitter orange peel (100%). Absolute alcohol content about 60 per cent.