§ 443. Pharmaceutical Preparations.—(a.) Of the leaves. Extract of Belladonna.—This contains, according to Squire,[487a] from 0·73 to 1·7 per cent. of total alkaloids. Belladonna Juice (succus belladonnæ).—Strength in alkaloid about 0·05 per cent. Tincture of Belladonna.—Half the strength of the juice, and therefore yielding about 0·025 per cent. of alkaloid.
[487a] Companion to the British Pharmacopœia, 1894.
(b.) Belladonna Root.—Belladonna plaster contains 20 per cent. of alcoholic extract of belladonna. Alcoholic Extract of Belladonna.—This extract, according to Squire,[487b] contains from 1·6 to 4·45 per cent. of alkaloid. Belladonna liniment is an alcoholic extract with the addition of camphor; its strength is about equal to 0·2 per cent. of alkaloid. Belladonna ointment contains about 10 per cent. of the alcoholic extract.
[487b] Companion to the British Pharmacopœia, 1894.
(c.) The Alkaloid.—Atropine Discs (lamellæ atropinæ).—These are discs of gelatin, each weighing about 1⁄50 grain, and containing for ophthalmic use 1⁄5000 grain of atropine sulphate. Similar discs are made for hypodermic use, but stronger; each containing 1⁄120 grain. Solution of Atropine Sulphate.—Strength about 1 per cent. Atropine Ointment.—Strength about 1 in 60, or 1·60 per cent. of atropine.
(d.) Stramonium.—An extract of the seeds is officinal in Britain; the alkaloidal content is from 1·6 to 1·8 per cent. There is also a tincture which contains about 0·06 per cent. of alkaloid.