Clindamycin
"I've always had clear skin until recently, my skin isn't horrible but I never had to worry about pimples on my face.   I have always suffered from chest and back acne.   Been using this about a year now.  Not one pimple now,  this began working at week #1.  Everyone skin will react different to products,  instead of saying it doesn't work day it didn't work for you,  because this product is a winner and wonder healer."