This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
In acute dysentery, with violent pain, severe prostration and frequent muco-sanguineous stools, small doses of corrosive sublimate, given at short intervals, commonly relieve in a few hours, and almost in a "specific" manner - certainly better than any other remedy I have known. Sublimate is equally useful in the "white dysentery" of Ceylon and India. I have seen the best results from it when opium, lead, and other astringents had proved useless. I thus agree with Wood, who asserts that in this malady "no remedial influence is more effective than that of mercury," rather than with Maclean, who deprecates its use in all forms and stages. I can only suppose that the injurious effects traced by him and by others to calomel, etc., resulted from doses that were too large.