Might need delay: While both can be used on the same patient, there are reasons why they may need to be separated by days, weeks, or months, depending on individual doctor recommendation and experience. One of retin-a's effects is to thin the top layer of skin. This might interfere with healing or affect amount of irritation from microdermabrasion. Both can be beneficial, but need to be used carefully.
Answered 11/20/2012
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