Doxycycline
"I've been dealing with severe to moderate acne for almost 13 years now (I'm currently 23 yrs old). I've been waiting for puberty to chill  out and stop breaking me out, but it hasn't so I decided to see a derm about my options. she prescribed me doxy and it worked FABULOUSLY!! I took the first pill that night, went to bed and when I woke up ALL of my acne was gone!!13 years of horrible acne and over night it was gone! for 3 days I took it 2x a day like I was told, but I decided since it was working so well i only wanted to take it once a day considering doxy is a strong antibiotic and I didnt want my body to get such a strong dose for 2 weeks. As soon as I finsihed the acne came back, with a vengence. I'm going to look into accutane"