Nezol Eye Drop is a prescription medicine used to treat allergic diseases of the eye. It relieves redness and swelling of the eye and provides temporary relief from burning and discomfort. Nezol Eye Drop is to be used only in the affected eye in the dose and duration as advised by the doctor. Wash your hands before using this medicine. It is advised to check the label for directions before use. Do not skip any doses and finish the full course of treatment even if you feel better. The most common side effects include pain, irritation, or stinging at the site of application, blurred vision, and photophobia. In case of accidental contact with your ears, nose, or mouth, immediately rinse it with water. Inform your doctor if you have a known allergy to any of the ingredients in this medicine or if you are taking any other medication. It is advised not to drive or operate heavy machinery immediately after using this medicine as it may cause temporary blurring of vision and may affect your ability to drive.