<p>If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using oxytetracycline or polymyxin b sulfate ointment while you are pregnant. It is not known if this medicine is found in breast milk. If you are or will be breast-feeding while you use oxytetracycline or polymyxin b sulfate ointment, check with your doctor. Discuss any possible risks to your baby.</p>