The bark of Prunus serotina (Cerasus serotina) collected in autumn.

Characters. - In curved pieces or irregular fragments, one twelfth of an inch (two millimetres) or more thick, outer surface greenish-brown, or yellowish-brown, smooth and somewhat glossy, marked with transverse scars; if collected from old wood and deprived of the corky layer, the outer surface is nut-brown and uneven; the inner surface somewhat striate or fissured. Upon maceration in water it develops a distinct bitter-almond odour; its taste is astringent, aromatic and bitter.

The bark of the small branches is to be rejected.

Preparations

Dose.

Extractum Pruni Virginianae Fluidum ..............................

.30-60 min. (2-4 c.c.)

Infusum " " " .........................

.2-3 fl. oz. (60-90 c.c.)

Syrupus „ „ „ ..............

.1-4 fl. dr. (4-16 c.c.)

Uses. - A nervine sedative and tonic, used in atonic dyspepsia and general debility, associated with general or local irritation. In large doses it renders the action of the heart slow. It has been employed in hectic fever and consumption, and in functional and organic cardiac disease.