No: Tretinoin and benzoyl peroxide work in different ways to control acne, but they do not counteract each other. In fact, there is a prescription medication with both ingredients in it; however, it's fine to use each one individually (and cheaper, as well).
Answered 3/15/2014
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No: No. They are often used together to treat acne, though may cause skin dryness and discomfort.
Answered 9/28/2016
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