Differin
"For a while I was struggling with the worst most painful acne of my life. I bought a tube of Differin for $15 and within a week inflammation was down and things were looking good.  2 months into it I don't have a single pimple on my face. I only wash my face once every 3 days to help prevent over drying and every night I remove my makeup, use a micellar water, apply a layer of Differin, and then an oil mixture to moisturize. I've found that facial oil rather than a moisturizer increases the effectiveness of Differin, it almost seals it close to the skin at night. Wouldn't recommend Differin to everyone, but it worked wonders for me. Its all about patience and dedication."