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Allergic contact dermatitis induced by zinc pyrithione in shampoo: a case report
Chih-Wei Hsieh, Mei-Eng Tu, Yu-Hung Wu
DERMATOLOGICA SINICA 28 (2010) 163–166

Shampoo-induced allergic contact dermatitis is difficult to diagnose clinically because
it can involve multiple and variable areas where the shampoo flows. Zinc pyrithione is a
common active agent in medicated shampoo that is known to have good anti-dandruff
and antifungal effects. Despite its low risk of sensitization, cases of allergic contact dermatitis
still occur because of the popularity of such products. We report a 33-year-old
man who developed pruritic rash on his scalp, face, neck, and hands after using a new
shampoo containing zinc pyrithione. A patch test revealed a positive reaction to zinc
pyrithione and personal shampoo containing zinc pyrithione.

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