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A 38-year-old female asked:

How long is tretinoin cream effective for? i have it about a yr & it doesn't burn or irritate even if used on new skin like the arm.

1 doctor answer3 doctors weighed in
Dr. James Ferguson
Pediatrics 48 years experience
Some basics: This product like many similar ones comes in differing strengths. They generally have an effective shelf life of a couple years. Effect on regular thick skin like your arm is much less than the fragile tissues of your face. Leave it on too long & you may burn your facial skin. Use it for the duration you have developed a tolerance to & it may just do its job.
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Last updated Apr 4, 2019

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