Ketoconazole shampoo (Nizoral) is an effective treatment to fix dandruff but has also been shown to help stop hair shedding/fall and increase hair thickness with consistent use. It also has DHT blocking properties, making it an effective treatment to help reverse hormonal hair loss (androgenetic alopecia) and in some cases regrow hair. For best results, lather on scalp, leave on for 5 minutes, and then rinse and condition. Use up to 2-3x/week and combine with other remedies for hair loss or hair