Doxycycline
"I've been taking this for about four months now, and I only really have good things to say about it. I take this everyday along with a birth control pill and the results are wonderful. I used to have moderate acne and NOTHING I did helped. This is the first time something really worked and my skin is 99% clear now. Seeing even a small zit on my face is very rare. A few tips though: it took about three weeks before I saw results, and they weren't that impressive at first, but over time I gradually got better skin. Just be patient. Also, I tended to still get bad breakouts around that time of the month, BUT in combination with a birth control pill, that went away. So, if you have hormonal acne, I strongly suggest this! I had great results."