"i am 14, and i started using doryx about a month ago. it hasn&#039;t worked for me, actually within the first few weeks my acne got worst, bigger, redder, and more painful pimples on my face.  in the dermatologist&#039;s office he said if this doesn&#039;t work in a month give me a call and we will give you something else. so i called him today, and he tells me to use it for another month. do you really think i want my acne to get worse. no! i was skeptical so i got online. some reviews say it worked instantly, others say it took months, and some even say it never worked. i guess i will keep using it for another month, but if it doesn&#039;t clear my skin i will go back to my dermatologist."