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 purpura simplex, 10-gr. doses of nitrate of potash have been sometimes useful, and even in hemorrhagic purpura the same remedy in large doses (10 to 60 gr.) has been recommended (Carlyon). The advantage of potash salts in true scurvy is not clear, but for the special ulceration of the gums, the chlorate is certainly good (Lancet, ii., 1860, etc.). Both the nitrate and the tartrate are of service in the treatment of capillary hemorrhage; the former has been used, especially in haemoptysis accompanied with febrile excitment (Gibbon), and the latter in hemorrhage from the kidney, bladder, and rectum. Half-drachm doses of the acid tartrate quickly arrested a hemorrhage connected with a malignant growth of the bladder, and 2 dr. is an efficient dose for relieving the loss of blood from piles (Ramskill: British Medical Journal, i., 1867).