The dried leaves and flowering tops of Hyoscyamus niger.

Tinctura Hyoscyami.—Tincture Of Hyoscyamus, U. S. P.

One hundred c.c. represent the soluble constituents of 10 gm. of Hyoscyamus in diluted alcohol, and contain approximately 0.007 gm. of mydriatic alkaloids, chiefly hyoscyamin and scopolamin.

Action and Uses: The uses of tincture of hyoscyamus are similar to those of tincture of belladonna. It is thought to be more sedative to the nervous system.

Dosage: From 0.6 to 2 c.c. or from 10 to 30 minims.