acne
"I've had acne problems since the 4th grade and have since tried tretinoin, benzaclin and dalacin T which did not help me very much. I gave up prescriptions for the last 5 years using OTC benzoyl peroxide when I suddenly had the WORST breakout of my life (I think from stress) with cystic acne. Family doctor gave me Differin XP gel. I've been using it for 1 month and my acne has dramatically cleared up. I did not purge at all (maybe got 3-5 small pimples) and I peeled once while swimming outside. I was also prescribed 333mg erythromycin tab by a dermatologist but did not take it yet as it seems differin has already cleared me up. 

I did skip a few days and used 4 dot sized amounts instead of the recommended "pea-size.""