"doxycycline definitely works!! i&#039;ve suffered from moderate to severe acne since year 6 and i&#039;m now in year 10. i started trying different prescribed antibiotics back in around december last year and i suffered side effects from both of them so my gp put me on doxycycline in january and i couldn&#039;t be happier! during the first 1-2 weeks i didn&#039;t really notice much improvement but after that my skin has cleared up dramatically and i finally feel confident again. unfortunately what i found was that if you run out of the medication therefore are unable to take a tablet for a couple of days, the acne returns (not severely in my case but all the same) which makes me wonder how long i&#039;ll have to be on the medication for. but definitely 10/10!!"