Is it safe to use keflex/cephalexin antibiotics 500mg 3x a day to treat possible mouth infection due to a burn during pregnancy? im 17 weeks pregnant

Start: Start by seeing a dentist to evaluate your situation and advise you. Burns usually just heal on their own. If necessary, your dentist can discuss treatment and medication with your Obstetrician. Please do not diagnose nor treat yourself. You are not a professional with training in this area and can do more harm than good. The professionals will do what's best for you and your unborn child.

Yes: Antibiotics of the cephalosporin class are generally considered safe during pregnancy if prescribed. However, most burns do not require antibiotic treatment and respond well to just keeping the area clean. A Dentist or doctor can prescribe an oral rinse if needed, but generally just brushing the teeth and rinsing with water twice a day is sufficient to allow healing of a hot food type mouth burn

Not wise: Prescription medications should not be taken randomly. Exact dosage and duration should be decided on by your Physician or Dentist, and medication should be taken exactly as directed for as long as directed, not for as long as you think you need the Meds. While the antibiotic you mentioned should be safe during pregnancy, it is usually not required for a burn. Ask your OBGyn & your DDS/DMD.