This section is from the "A Handbook of Useful Drugs" book, by State Medical Examining and Licensing Boards.
The dried rhizome of Rheum officinale is occasionally administered either in the form of powder or in the form of "cubes" or "fingers."
Action and Uses: Rhubarb and the extract are cathartics, bitter tonics and stomachics, while the aromatic tincture and the aromatic syrup are laxative and to a slight extent astringent. As cathartics they act chiefly on the colon and have a tendency to produce constipation after the initial laxative effect. Hence they are an appropriate remedy in the beginning of diarrhea as they cause the expulsion of irritating substances and promote a return to normal by their constipating influence.
Dosage: 1 gm. or 15 grains.
A hydro-alcoholic extract of rhubarb evaporated to a pilular consistency.
Dosage: 0.25 gm. or 4 grains.
Aromatic tincture of rhubarb represents rhubarb (20 gm.), cinnamon (4 gm.), cloves (4 gm.) and myristica (2 gm.), in a mixture of glycerol, alcohol and water to make 100 c.c.
Dosage: 2 c.c. or 30 minims.
For all practical purposes this represents aromatic tincture of rhubarb (15 c.c.) with sufficient syrup to make 100 c.c.
Dosage: 8 c.c. or 2 fluidrams.