Acne: Most acne treatments, including retin a, (tretinoin) take a minimum of 2 weeks to start working and more likely 6-8 for better effect. Most studies looking at effectiveness of acne medicines look at the skin after 12 weeks. Unfortunately not overnight like most teens would like.
Answered 5/4/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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