Deadly nightshade.

Belladonnae Folice

Belladonna-leaves. The leaves of Atropa belladonna Linné (Nat. Ord. Solanaceae), U. S. P. Feuilles de bella-done, Fr.; Tollkraut, Ger.

Belladonnae, Radix

Belladonna-root. The root of Atropa belladonna, as above. Racine de belladone, Fr.; Belladonnawurzel, Ger.

Emplastrum Belladonnoe

Belladonna-plaster. (Belladonna-root and resin-plaster.)

Extractum Belladonnae

Extract of belladonna. Dose, gr.1/4 gr- J-

Extractum Belladonnae Alcoholicum

Alcoholic extract of belladonna. Dose, gr.1/4—gr. j. Prepared from the leaves.

Extractum Belladonnae Fluidum

Fluid extract of belladonna. Dose,τη j—τη v. Prepared from the root.

Tinctura Belladonnae

Tincture of belladonna. Prepared from the leaves. Dose, τη v— 3 ss.

Composition

Belladonna contains a peculiar alkaloid, atropine, on the presence of which the physiological activity of the drug depends. This principle is found chiefly in the bark of the root, and of young root. Another principle has also been discovered analogous to atropine, to which the name belladonnine has been given. Ladenburg has shown that belladonnine is identical with the active principle of hyoscyamus, or hyoscyamine. It is identical with atropine in composition, and can only differ in the arrangement of its molecules. The root also contains a fluorescent substance and a coloring matter, which has been called atrosin. Atropine exists in the plant in combination with malic acid as bimalate.