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.
There can be no doubt that iron has a special determination to the mucous membrane of the urinary tract, and my own experience, as well as that of others, has proved its great value in catarrhal affections of the bladder. The carbonated iron waters of Schwalbach are especially recommended (Schmidt's Jahrb., 1877, Bd. clxxiv., p. 84), and are certainly less irritant than the acid preparations. In cases of catarrh and hemorrhage, following the injudicious use of the catheter, weak injections of tinct. ferri, retained for about half a minute, check the hemorrhage and cure the catarrhal condition (Medical Times, ii., 1870; see also Hasmaturia). Other instances of the value of iron in vesical catarrh are reported by Vigla (Medical Times, 1857-58).