My 13 yr old has started getting back acne the last 6 months. She was put on an antibiotic for 3 months but its not working and I'm going to ask for a dermatologist recommendation. I heard Epiduo gel works well. For the face I recommend Tersiceptic - its an antibacterial wash - nothing fancy but it works. She had some on her face but this wash cleared it up.
http://www.epiduo.com/