Doxycycline
"I thought this medication wouldn't be that effective but I was WRONG. It cleared my skin in 5 days and even got rid of large cystic acne that I had for like 6 months and nothing helped! I Am amazed. Everyone is saying how my skin is glowing and beautiful. Well I didn't really think it was the Doxycycline doing it until I stopped and bam broke out all over again. So I started back on it and in 2 days it is clearing the large cystic acne that came back. The only down side is it gives me stomach cramps and pain. I think it helps to drink a lot of water. If you are skeptical of this just give it a try. It works well for adult hormonal acne."