Studies show some of the chemicals in coal tar may cause cancer, but only in very high concentrations, such as in what is used in industrial paving. Anyone using tar regularly should follow a regular skin cancer checkup schedule. California requires OTC coal tar shampoos, lotions and creams that contain more than percent coal tar to be labeled with cancer warnings. However, the FDA maintains that OTC products with coal tar concentrations between percent and 5 percent are safe and effective for psoriasis, and there is no scientific evidence that the tar in OTC products is carcinogenic.
My foot & ankle specialist prescribed a compounded transdermal cream for nerve pain along the outside of my foot right below the ankle from toes to heels & it helps. I’m also been using it for fibromyalgia pain. I recently tried it for varicose vein pain & have found it works for that too. Very pleased with results. I am diabetic so it also greatly helps with diabetic nerve pain in the feet. Very easy to use, mine comes in a clear plastic container that dispenses the right amount for each dose much like a lotion pump. Just need to rub it in well. No mess, no pill. I think a physician has to place the order with the pharmacy.