Dandruff, pityriasis, and seborrheic dermatitis may be considered to be the same condition. Most people have some degree of dandruff, but more severe cases may require specialized shampoos.
Dandruff has been linked to a skin fungus called Malassezia, so medicated antifungal shampoos are the first-line treatment for mild dandruff.
First-line recommendations:
Pyrithione Zinc: An antifungal and anti-inflammatory agent. Use 1% shampoo 2–3 times weekly. Pyrithione zinc 1% shampoo.
Ketoconazole: An antifungal effective against Malassezia yeast, which is associated with dandruff. Use 1% shampoo twice weekly. Ketoconazole 1% shampoo.
Second-line recommendations:
Selenium Sulfide: An antifungal and keratolytic agent. Use 1% shampoo twice weekly. Selenium sulfide extra strength shampoo.
Coal Tar: Slows skin cell turnover. Use 0.5–5% shampoo once or twice weekly. Coal Tar Therapeutic Shampoo.
Prescription medications:
For severe cases, corticosteroid lotions or stronger antifungal shampoos (e.g., 2% ketoconazole) may be prescribed.
Citation:
Grimalt, R. (2007). A practical guide to scalp disorders. Journal of Investigative Dermatology Symposium Proceedings, 12(2), 10-14.