acne
"I've been on doxycycline 3 weeks now, I've had cystic acne for 3 years now I have it under control with benzoyl peroxide.  I still have a few cysts here and there so I decided to try the doxy to get rid of all of it once and for all, I've noticed my overall skin more glowy and healthier looking and I haven't had 1 cyst since getting on it but I have had several small zits in places I never usually get them like my forehead. I think that's the medicine pushing out all the bad stuff hopefully it will be 100% by the 1 month mark when I go back to the derm (I'm also using retin-a topical at night) doxy never effected my stomach or gave me any type of side effect at all."