The dried leaf of Digitalis purpurea, purple foxglove. Collected from wild indigenous plants, when about two-thirds of the flowers are expanded, B.P. The leaves of Digitalis, U.S.P.

Characters.- Ovate-lanceolate, shortly petiolate, rugose, downy, paler on the under surface, crenate.

Composition. - Contains a number of active principles formerly included under the name of digitalin (vide p. 995).

Preparations.

B.P.

Dose.

Infusum Digitalis (3 gr. to 1 fl. oz.).........................................

2-4 fl. dr. or more.

Tinctura ,, (54 1/2 gr. to 1 fl. oz.)................................

5-30 min.

U.S.P.

Abstractum Digitalis .................................................................

1/2-1 gr.

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

1/4-1/3

,, ,, Fluidum ..................................................

1-2 min.

Infusum ,, ..................................................................

1 2 fl. dr.

Tinctura ,, ..................................................................

5 10 min.

Infusum Digitalis. Infusion of Digitalis. - Digitalis leaves, dried, 30 gr.; boiling distilled water, 10 fl. oz. Infuse in a covered vessel, for one hour, and strain, B.P. Digitalis in No. 20 powder, 3; cinnamon in No. 20 powder, 3; boiling water, 185; alcohol, 15; water, q.s. Pour the boiling water on the mixed powders and macerate for two hours in a covered vessel. Then strain, add the alcohol and pass enough water through the strainer to make the infusion weigh 200 parts, U.S.P.