Personally, I would stop the Antibiotics ASAP! My son was on Antibiotics for Acne and when he stopped, the Acne just returned in full force. Shortly after that he got an eye infection (pink eye) which should have gone away with a simple, basic Antibiotic treatment...but didn't. He had to go on a really strong Antibiotic for several weeks that required having his eyesight checked during the course of treatment to make sure it wasn't making him blind in the process. Antibiotics should be used sparingly and judiciously!
Now I have him on nutrient therapy as well as face wash with salycilic acid and will be starting him on a Colon Cleanse as well. His face isn't perfect...but it looks much better! The more I research, the more I understand this requires cleaning the inside (including yeast, parasites, etc.)