Children ages 2 months to less than 19 years old, who have been diagnosed with a middle ear infection may receive either medicated ear drops (AR01) or glycerin (placebo) ear drops. The patient or caregiver will measure the amount of ear pain before and after the ear drops to establish if the medicated ear drops decrease the amount of pain more than the placebo ear drops. The subject may leave the clinic 60 minutes after the first dose. The ear drops can be used up to 4 days, as needed for ear pain.