Salicylic acid /BPO: Salicylic acid and benzoyl peroxide are the main active ingredients in most of the over the counter acne medications. You choose what strength you want for each, up to 3% for sa and up to 10% for bpo. Sometimes the combination of both can help. If you are no better within 6-8 weeks, call your doctor for help.
Answered 7/4/2012
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