acne
"I started Doxycycline December last year and initially it broke my skin out horrendously as it has a "purging" effect. The spots will be red and quite painful, (I found using Ice soothed them down quicker). After about 3 weeks my skin started to clear, and after almost a year I had stopped taking them. Recently I began again after breaking out more than usual, after about a 4 month break, and my skin has had that same purge experience. It seems that these do help but once your skin clears I'd avoid going back on them and find other ways to fight the light break outs. I use it in conjunction with Isotrexin gel."