Acne
"I have always had clear skin until I turned 30 and just one day I  started having severe acne all over my face. Called up my derm and she recommended Doxcycline. I am on my week 2 of this drug. Not seeing any major changes yet. Derm said that I need to take it 2x a day with food and apply topical cream (Retin A) at night. I really really hope it clears up after 2 months of course."