Doctors usually prescribe an oral antibiotic such as penicillin to treat leg cellulitis, according to MedicineNet. If the oral antibiotics are not successful in treating the condition, the doctor may prescribe a different type of antibiotic or call for the administration of an intravenous antibiotic in the hospital.
The doctor often prescribes a two-week regimen of antibiotics that the patient should complete even if the condition improves, says Healthline. Sometimes doctors also call for the use of pain relievers to help ease the symptoms of cellulitis. Patients whose symptoms do not improve within three days after starting the antibiotics, whose symptoms get worse or who develop a fever should contact the doctor.