Methasol-N is a combination ophthalmic, otic, and nasal solution containing Betamethasone 0.1% and Neomycin Sulphate 0.5%. Betamethasone is a potent corticosteroid that reduces inflammation, while Neomycin is a broad-spectrum antibiotic that combats bacterial infections. This combination is effective in treating inflammatory conditions where bacterial infection is present or likely