Learn all about Nizoral shampoo, (Ketaconazole 2%)izoral is a unique anti-dandruff shampoo. Nizoral 2% is the only shampoo containing the patented active ingredient ketoconazole, medically proven to be effective against Pityorosporum ovale, the organism which most skin specialists agree is the cause of dandruff. Most other anti-dandruff shampoos work by normalizing the pH of the scalp. That is, they try and modify the environment which allows the fungi to survive.
