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PCID-10ZN is a part of the Selsun brand of medicated shampoos, which is specifically designed to help control flaky scalp and dandruff. It is a triple-action anti-dandruff formula that not only eliminates dandruff, but also helps soothe scalp discomfort and protect against dryness and itch. It contains pyrithione zinc as its active ingredient and also contains other ingredients such as water, cetyl alcohol, stearyl alcohol, sodium lauryl sulfate, glycerin, and hydroxypropylcellulose, among others.