Serous otitis media (SOM) is when the eustachian tube ... The tube is also more horizontal in children, making it less likely to drain fluid. In adults, the tube has more of a sloped angle ...

Acute otitis media: 1–12yrs: 5 drops in affected ear(s) twice daily for 10 days. Chronic suppurative otitis media: ≥12yrs: 10 drops in affected ear(s) twice daily for 14 days.