Azelaic acid
"I just started this medication about 3 days ago.  I have horrible, deep, pustule acne, with nodule and cystic acne as well.  Since i've started this medication, the inflammation is practically GONE...no new pimples have come up, and my face actually feels smoother, IN JUST 3 DAYS.  I'm in shock.  I just found out that i'm pregnant, as they were in the process of getting me started to try accutaine...i'm glad i was pregnant because, i'd rather use this stuff if it works first, rather than a harsh med.  So hopefully this continues to help, and i will be sporting beautiful skin in a month or so.  I've never had skin so smooth as it is already now, so i'm super excited. I've been suffering with acne for over 10 years, so this is really a relief"