 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  Use eye drops before eye ointments to allow the eye drops to enter the eye. Overuse of this type of medication may result in increased eye redness (rebound hyperemia). Tell your doctor if this occurs or if your condition lasts or gets worse after 48 hours. If you develop eye pain/vision changes or think you may have a serious medical problem, get medical help right away.The side effects of Naphazoline-Zinc Sulfate-Glycerin Ophthalmic (Eye): Stinging, redness, widened pupils, or blurred vision may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. If your doctor has directed you to use this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: eye pain, other vision problems, worsening redness/itching/swelling in or around the eyes, dizziness, nausea, sweating, drowsiness, weakness, nervousness, headache, decrease in body temperature, irregular heartbeat. A very serious allergic reaction to this drug is rare. However </s>