Question: how long does erythromycin ophthalmic ointment take to work?
Answer: Apply a ribbon approximately 1 cm in length to the infected structure of the eye up to 6 times daily, depending on severity of infection. For the treatment of chlamydial conjunctivitis or ophthalmia neonatorum caused by Chlamydia trachomatis. 50 mg/kg/day PO in 4 divided doses for 14 days.