Ultracillin Ampicillin Drospirenone + Ethinyl Estradiol
ModerateCertain antibiotics including ampicillin, other penicillins and tetracyclines may reduce the efficacy of oral contraceptives.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.