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A 49-year-old member asked:

How long would retin a (tretinoin) take to clear acne?

1 doctor answer2 doctors weighed in
Dr. Zoey Goore
Pediatrics 25 years experience
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.
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Last updated May 4, 2015
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