"follow the instructions and heed the words of the people who have used it before, and i feel like there&#039;s no reason differin won&#039;t work for you. i&#039;ve had problems with adult/hormonal acne for awhile now, and this is the first and only thing that has made a seriously noticeable improvement. my skin did do the &quot;purge&quot; before it got better, but i just gave it some time like the instructions and other users said, and in about 3-4 weeks i noticed serious improvements in my skin. it looks much better than it has in years. if you&#039;re not a patient person and will give up when the purge happens, then don&#039;t waste your money."