great for psoriasis [SEP] i buy everything i review to receive five stars a product must meet of the manufacturers claims i don t subtract because i don t like the color or appearance too subjective and personal i review form function ease of use and construction quality please forgive typos controls the itch of psoriasismy verdict details below true for most peopleas a physician i know how itchy this condition can be on your scalp i recommend coal tar shampoo to all my patients most dandruff shampoos use salicylic acid which is aspirin for the itching which is not very good at stopping the itch my wife has tried that with no success coal tar is much better at controlling it and is the active ingredient in most topical creams for psoriasis of the skin it is available in higher strengths by prescription but this product at is sufficient for most scalpsjust use it week for adequate control let it sit in the scalp for five minutes which means apply immediately upon entering the shower then do your stuff just before exiting wash it out it is okay to leave some in the scalp it will not hurt you you may wish to use shampoo after but this has shampoo conditioner in it and in my experience using other hair products is counterproductivethis tingles so you know it is working the only problem it is nearly impossible to find in stores and is often sold out at amazon other companies make similar products just type coal tar shampoo in the search bar to find others they all have coal tar you need a script for for some idiotic reason what you are going to get addicted to the stuff and overdose the fda is a real killer sometimesif you itch here is the product for you if you can find it denorex does a lousy job of marketing this product