This section is from the book "Botanic Drugs Their Materia Medica, Pharmacology and Therapeutics", by Thomas S. Blair. Also available from Amazon: Botanic Drugs, Their Materia Medica, Pharmacology and Therapeutics.
Trailing Arbutus, Epigaea repens. Contains arbutin, also found in chimaphila, q. v. and others of the Ericaceae. See "Chimaphila" for the pharmacology. Therapeutically, chimaphila, epigaea, and uva-ursi are similar. They are urinary antiseptics and diuretics.
An infusion of the leaves of epigaea may be freely used as a diuretic. Dose: Fl., 10 to 60 minims; arbutin, 3 to 7 grains.