Which antibiotics are generally used to treat impetigo?

Depends: Most impetigo are caused by staph, and responds to Mupirocin ointment. However, if unresponsive, your doctor will culture the area and prescribe the appropriate antibiotic.

Impetigo: Antibiotics are the mainstay of conventional therapy. Topical anti-microbial ointments are often effective for staph impetigo, and treatments such as bactroban (mupirocin) ointment are commonly used. Oral antibiotics such as Keflex (cephalexin) - or Bactrim (sulfamethoxazole and trimethoprim) (septra) are used if there are concerns about methicillin-resistant-staph (mrsa).