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 cases of purulent and muco-purulent discharge from the vagina, the urethra, the ear, etc., lead lotion is very useful, and may be used at any stage, since, if sufficiently dilute, it does not irritate, like alum and some other astringents. If, however, improvement is not obtained from weak dilutions, the full strength should be tried, and zinc sulphate may be added in the proportion of 1 or 2 gr. to the ounce of lead lotion.