Hi, remember that antibiotics use to lose its properties after a time of taking them. When I was younger I used to go to all the dermatologist I found and at the end I realize they're not the most knowledgeable in acne matters. Really. I suggest you to visit
www.acne.org and follow the regimen they proposed step by step. It would do wonders, believe me, and is very cheap to do. BUT is important to do it EXACTLY as it is indicated, EXACTLY. Other way it won't work, but don't worry cause is also very simple. They also have a special section called Bacne, specially for the kind of acne you have. Good luck.