Articles which are in the British Pharmacopoeia are not included in this chapter, but many remedies are mentioned which are rarely heard of, and this is done because they are the very things that dispensers have difficulty in learning anything about when wanted.

Abanon

A magnesium phos-photartarate; a white and tasteless powder, slowly soluble in water. Dose:3j. to as an aperient.

Acetal is ethylidenediethyl ether [CH3.CH(OC2H5)2], a colourless fluid given in doses of 3iss. to 3iv. (emulsified with gum acacia) as a hypnotic in place of chloral hydrate. A mentholised ethereal eau de Cologne for headache is also called 'Acetal' in Germany.

Acetatoxyl

Acetyl-atoxyl (sodium para-aminophenyl arsenate, or sodium arsanilate). Used in sleeping-sickness in doses of 1/2 to 3 grains by subcutaneous injection.

Acetocaustin

Trade-name for trichloracetic acid, q.v.

Aceto-morphine. - Trade-name for diacetyl morphine, known also as heroine.

Acetonal is a solution of 82 parts of sodium acetate in 4,050 parts of liq. alumini acetici, P.G.

Acetopyrin, antipyrin aceto-salicylate, or pyrosal, is a feebly water-soluble compound, given in doses of 5 to 15 grains as an antipyretic and analgesic in rheumatism, neuralgia, and sick headache.

Acetozone, or benzozone, is benzoyl-acetyl-peroxide. Occurs in white crystals, slightly soluble in water. Used externally as an antiseptic lotion (10 grains to a pint of water, filtered), and internally in doses of 3 to 5 grains, mixed with as much milk sugar and administered in capsules. In commerce, acetozone is supplied mixed with an equal weight of inert powder to prevent decomposition, hence the necessity for filtering solutions.

Acid, Agaric, or agaricin, the active principle of white agaric, occurs in white, silky crystals or in crystalline powder. It is given to check the night-sweats of consumptives. Dose: 1/8 to 1/2 grain, in pill, three hours before bedtime, frequently combined with Dover's powder.

Acid, Arsino-Salicylic

Recommended as a substitute for atoxyl. In colourless needles, readily soluble in warm water and in alcohol. Dose, like atoxyl.

Acid, Cacodylic

Dimethyl arsenic acid [As(CH3)2.O.OH], in inodorous, rhombic crystals, soluble in water and in alcohol. Used chiefly in the form of sodium caco-dylate, which is a white, amorphous powder, for the treatment of psoriasis. Enormous doses of arsenic may thus be administered without toxic symptoms. The doses are 1/4 to I grain in pill, or by hypodermic injection. It is also given per ano. The solutions require a preservative (carbolic acid or thymol), and should be made with distilled water.

Acid, Camphoric

Crystalline scales, soluble in alcohol, slightly in oils, almost insoluble in water. Has antiseptic properties and is used internally in 10 to 30 grain doses (as powders) for night-sweats, bronchitis, cystitis, diarrhoea, and gonorrhoea. Also used as a bladder-wash in cystitis, dissolved in rectified spirit and water