The dried root of Atropa Belladonna. Britain or Germany

Characters. - From one to two feet long, and from half an inch to two inches thick, branched and wrinkled, brownish-white. An infusion dropped into the eye dilates the pupil. Roots which are tough and woody, breaking with a splintery fracture, should be rejected.

Composition. - Two alkaloids, atropine and belladonnine, the former under one per cent. Also a red colouring matter, atrosin.

Preparations.

B.P.

Dose.

Atropina....................................................................................................

1/200-1/20 gr.

Linimentum Selladonnae (1 oz. to 1 fl. oz., vide p. 516)

Extractum Belladonnae Alcoholicum .................................................

1/16-1/4 gr.

Unguentum Belladonnae

from alcoholic extract.................

Emplastrum „

U.S.P.

Atropina...................................................................................................

1/200-1/20 gr.

Abstractum Belladonnae..........................................................................

1/2 gr.

Emplastrum ,, ..........................................................................

Extractum ,, ..........................................................................

1-2 min.

Linimentum ,, (vide p. 517)......................................................