Uses: Irrational acetanilid preparation. The caffeine does not diminish the toxicity, nor does the bicarbonate increase the solubility of acetanilid, as was at one time supposed.

Dosage: 0.3 Gm. or 5 grains (N.F.).

Acetonum (Aceton.), Acetone, U.S.P. (Dimethyl-Ketone).

A colorless liquid, with an ethereal odor and a pungent sweetish taste. Miscible with water, alcohol, ether and chloroform.

Action and Uses: Pharmaceutic solvent.

*Acetphenetidinum (Acetphen.), Acetphenetidin, U.S.P. (Phenacetin).—C6H4(OC2H5).NH.CH3CO.

White, odorless, slightly bitter, crystalline scales or powder. Very slightly soluble in water (1:1310), soluble in alcohol (1:15) and in chloroform (1:14).

Action and Uses: Analgesic, antipyretic and, in excessive doses, a cardiac depressant. Used particularly for the relief of headache and neuralgic pains and in the treatment of mild fevers. A habit-forming drug. If used for a long period of time, it may produce a severe anemia.

Dosage: 0.3 Gm. or 5 grains (U.S.P.), in powders or capsules. If small doses fail to relieve headache, larger doses are also usually ineffective.

*Acidum Aceticum (Acid. Acet.), Acetic Acid, U.S.P.—Acetic acid CH3.COOH (about 36.5%).