Neutrogena T-Gel Shampoo One of the most-trusted dandruff shampoos is the Neutrogena T-Gel Shampoo ($7), which relieves flakes and itch using coal tar. [isn't coal-tar carcinogenic? you might want to be careful plugging this product if that is the case] Image Source: walgreens.com Neutrogena T-Gel Shampoo $7 from walgreens.com Buy Now