Doxycycline
"This helped my acne to a good amount, while I was on it. I took this religiously for 6 months. I did not see any improvements until around the third month, and up until this point I just kept asking why I'm the only one my age with acne, and why it won't go away. For the last three months of my prescription though, my acne was kept at bay. I still had 2-3 pimples on my face at all times, but it was better than the usual amount. I had scarring left over, but I think the biggest disappointment of this regimen was in is the fact that my acne came back with vengeance about a month after I stopped taking it. After 3 months of trying every drugstore/high end option, I'm going to go back to the dermatologist and try something new."