Apiol

A green, oily fluid, which is the active principle of parsley. Soluble in alcohol, but generally given in capsules (5 to 10 minims) as an emmenagogue, and in 15-minim doses for malaria. There is also a crystalline product called 'apiol,' which is the camphor (C,2H14O,,) of parsley. It occurs in colourless needles, and has been used in doses of 3 grains, dissolved in olive oil, for malaria and dysmenorrhoea.

Apocodeine Hydrochloride

A derivative of codeine, in grey powder, hygroscopic and soluble in water. Used in whooping-cough, bronchitis, and similar affections. Dose: 1/4 to I grain (or more) in pill; hypodermically, 1/6 to 1/2 grain. Also used hypodermically as a purgative in similar doses.

Apolysin (Alphacitrophen)

A greyish, crystalline powder, soluble 1 in 50 of water, the solution being acid in reaction. Resembles phen-acetin in constitution and action, and is used as an analgesic and antipyretic in doses of 6 grains (as powders) every two hours, or 8 grains in suppository with cocoa-butter.

Apyrol

Trade-name for a mixture of antipyrin (52) and quinine sulphate (48).

Argentamine

An 8-per-cent. solution of silver phosphate in 15-per-cent. solution of ethylene diamine. Of this a 1-in-4,000 aqueous solution is used as an injection in gonorrhoea.

Argentamine - albumose.- Silver nitrate-ethylene-diamine albumose. Contains 7 per cent. of silver. Readily soluble in water, the solution having an alkaline reaction. Used in 1 grain to solution as an injection in gonorrhoea.

Argentol (Silver Chinosepto-late).-A yellow powder, used as an injection (1 in 1,000 of water) for venereal complaints, and in doses of I to 5 grains for epilepsy and sciatica.

Argonin

A compound of casein and silver which occurs as a white powder and contains 4 1/4 per cent. of metallic silver. Bactericide, and used in 1 to 2 per cent. aqueous solution as an injection for gonorrhoea.

Arhovin

A yellowish liquid, a compound of diphenylamine and thymol benzoic ethyl ester, used as an antigonorrhoeic. Dose 4 minims.

Aristochin is a neutral carbonate of quinine, which is practically free from taste. Prescribed for children, and appears to have special utility in the treatment of malaria. Dose for the latter purpose, 5 to 15 grains.

Aristol, or dithymol diiodide, is a substitute for iodoform, and is used for the same purposes. It contains about 46 per cent. of iodine. It is a brownish,amorphous, and odourless powder. Used preferably in powder for old ulcers, and in 5 and 10 per cent. ointment (lanoline or vaseline basis heated very cautiously) for the treatment of eczema and ringworm.

Arrhenal (Disodium Methyl-arsenate) occurs in colourless crystals, rapidly soluble in water. Therapeutically it resembles sodium cacodylate or sodium dimethyl arsenate, and is given in doses of from 1/4 to 1 grain.