Ketoconazole
"I had a very oily Itchy scalp that was covered in yellow gunk that Shampoo would not remove. I tried nizoral which was fantastic at shifting the gunk and oil but four months later has done nothing for the itching. So I don't really know if it's seborrheic dermatitis anymore....!! It's slowly losing its effectiveness as times gone on. I don't think that Shampoo alone will fix any scalp condition, it's a holistic whole body approach that's needed."