Acne
"I LOVE Doxycycline for acne. It is the only thing that gave me clear skin. I wish I was okay with taking it daily for the rest of my life. But taking any antibiotic long term is bad for both the body and environment.  I did for vanity purposes, take doxycycline for a year. My skin looked AMAZING the entire time I was on it.  When I quit taking it, all my adult acne came back. If you are considering it for acne, I can you it was incredibly effective.  My face misses it greatly. I started out taking 100 mg in the am and 100 mg in the pm. That upset my tummy, so I went down to just 100 my once a day and it worked great."