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.
Charcoal. Official. Used in flatulence with fetid breath and offensive dysenteric discharges. Charcoal may also be added to poultices, which may then have a disinfectant action. Dose: 10 to 60 grains.