Nizoral Ad Dandruff Shampoo vs. Head and Shoulders: Which is Best?It can be frustrating to deal with the itchy, flaky scalp of dandruff and even a bit embarrassing when those tell-tale white flakes scatter across the front of your new black blouse. It’s enough to make you want to put away your dark clothing! Fortunately, dandruff is easier to deal with these days with the many shampoos available to treat this common condition. One shampoo that’s been shown to be effective for treating the symptoms of dandruff is ketoconazaole dandruff shampoo, known by the brand name Nizoral AD. This shampoo was previously available only by prescription, but a less concentrated form was manufactured for over-the-counter use in the 1990’s.