This section is from the "A Handbook of Useful Drugs" book, by State Medical Examining and Licensing Boards.
3,7-dimethyl-xanthin, a base occurring in Theobroma cacao, and other drugs, and also made synthetically. It is closely related to caffein (1,3,7-trimethyl-xanthin).
Properties : Theobromin occurs as a white, crystalline powder, odorless, and having a bitter taste. It is very slightly soluble in water, but is soluble in alcohol (1:100).
Action and Uses: Theobromin has an action on the kidneys and heart similar to that of caffein, but its effect on the central nervous system is less marked.
Theobromin is used as a diuretic in all forms of dropsy, but it is especially useful in renal dropsy. It is non-irritating to the kidney.
Dosage: 0.3 gm. or 5 grains.