Optihist Plus Eye Drop is a doctor endorsed medication utilized in the treatment of allergic eye diseases It relieves redness and swelling of the eye and provides temporary relief from burning and discomfort Optihist Plus Eye Drop is to be utilized only in the affected eye in the dose and duration as advised by the doctor Wash your hands before using this medication 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 Common side effects of this medication include burning and stinging at the application site If these side effects persist for a longer duration inform your doctor In case this medication goes into your ears nose or mouth accidentally immediately rinse it off with water Inform your doctor if you are allergic to any ingredients of this medication or if you are taking any other medication It is advised not to drive or operate heavy machinery after using this medication as it may cause temporary blurring of vision and may affect your ability to drive