Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: Thank you, Doc. So salicylic acid should work better than selenium sulfide? Selsun Blue and Head and Shoulders have both.Correct, I have been rubbing it in gently and washing it out after 10 minutes.. ### Response: There is no evidence that one active ingredient in these shampoos works better than another for seborrheic dermatitis. I was making a suggestion to help remove the adherent scale..