Abstract: A medication nebulizer adapter system for administering aerosol treatments for newborn and pediatric patients. The nebulizer adapter system of the invention includes an adapter for positioning in the mouth of the infant. The adapter serves to depress the tongue of the infant and to deliver nebulized medication to the rearward area of the infant's throat, where the medication may be subsequently inhaled into the lungs of the infant. By directing the medication to the infant's throat, as opposed to through the nose of the patient, the filtering effect of the nasal passageways may be avoided, thereby more efficiently delivering nebulized medication to the lungs of the patient.