Doxycycline
"At first I hated this pill because it was doing absolutely nothing for me beside make my skin worse.. I've only had what you'd consider very mild acne but after many tantrums i persisted and kept up with the pill and now I'm nearly on my 6th week and it's only just now that my skin is starting to become noticeably more clear, all I can say is that keep with it even if it does make your skin worse in the beginning because it does work it just takes its time but everyone's experience will be different:) can't wait to see my skin after 2-3 months! 

My rating of a 6 is simply because I've been on it for 6 weeks haha so need I say no more, it will more than likely go up as I progress on it!"