Examples are Dicloxacillin 500 mg orally every 6 hours for 7 to 10 days For women allergic to penicillin, cephalexin 500 mg orally 4 times a day or clindamycin 300 mg orally 3 times a day for 10 to 14 days Erythromycin 250 mg orally every 6 hours is used less frequently.