Generally compound neomycin sulfate eye drops should not be put into the nose, beyond the instructions for use, may cause adverse reactions. Compound Neomycin Sulfate Eye Drops belongs to a kind of ocular broad-spectrum antimicrobial drug, and its ingredients mainly include Neomycin Sulfate and Dexamethasone Sodium Phosphate. Because it is an ophthalmic drug, it is suitable for conjunctivitis, keratitis, iritis, scleritis and so on, but it does not have the role of treating nasal diseases, so it is generally not allowed to drop into the nose. It is important to note that it needs to be contraindicated in people who are allergic to any of the components of the product, in patients with fungal corneal ulcers, and in patients with herpes simplex virus keratitis. Patients who use the drug frequently for a long period of time may experience adverse reactions such as increased intraocular pressure or glaucoma, cataract with clouding under the posterior lens capsule, and fungal blepharitis. Patients are advised to use compound neomycin sulfate eye drops as prescribed by the doctor, and not to use it without authorization to avoid causing adverse reactions.