The recommended dosage of Naphthamivir Eye Drops instructions is 1 to 2 drops in each eye, 3 to 4 times a day. The main ingredients of Nafamivir Eye Drops are Naphazoline, Chlorpheniramine Maleate and Vitamin B12. Naphazoline can alleviate allergic symptoms, can constrict blood vessels and alleviate the symptom of ocular congestion; Chlorpheniramine Maleate can alleviate the allergic symptom; Vitamin B12 has the effect of maintaining the function of the eye. Nafamivir Eye Drops can cause eye discomfort after medication, manifested as eye inflammation, pupil dilation, blurred vision, eye congestion aggravation and other symptoms; headache and dizziness, blood pressure and glucose elevation, cardiac arrhythmia and other adverse reactions may also occur. Attention closed-angle glaucoma patients are prohibited. Use with caution in pregnancy and lactating women. Infants and children should be used under the supervision of a physician. Patients must use the drug under the guidance of a specialized physician and strictly comply with medical advice.