Betamethasone is a type of medicine called a corticosteroid (or steroid). Corticosteroid medicines are used for reducing inflammation.
Neomycin is a type of medicine called an aminoglycoside antibiotic. It kills bacteria and so prevents them from increasing in numbers and causing infections in the eyes, ears or nose.
Betnesol-N eye, ear, and nose drops contain two active ingredients, betamethasone, and neomycin.