I have a funny story I should share about visiting the doctor in January. But I don't have time to write it now.
But my doctor did recommend Selsun Blue to get rid of those small patches of seborrheic dermatitis that have been on my forehead for years. That didn't work. They vanished, but returned when I stopped using that shampoo.
So he prescribed Nizoral 2%. It's priced strangely. The over-the-counter 1% version is only $20 on Amazon. The prescription bottle had a $15 co-pay, and a total cost of about $60. So it was cheaper for me, but a bit overpriced to my insurance company. I guess that is how medicines work these days.