We prepare a glycerole of tar for local use in the following way: Heat a pound of glycerine and of tar in separate vessels; whilst heating, rub up an ounce of starch in a mortar with a portion of the glycerine, and stir it in until thoroughly mixed; when hot pour the two together, boil for a moment, then stir until cool.
Glycerole of tar prepared in this way is a specific for many forms of pruritus. In pruritus ani it is so certain in its action, that I prescribe it with an almost positive certainty that it will not only give present relief, but will effect a radical cure. In eczema with pruritus, it has proven an admirable remedy, and has effected cures in protracted and very stubborn cases. The indication for its use is itching.
Tar has been used internally, with reported good effects. To test it in chronic bronchial disease, and for the relief of cough, I would suggest one part of tar to nine parts of glycerine, combined with heat.
Specific Medication and Specific Medicines, 1870, was written by John M. Scudder, M.D.