i used nasonex as needed for alergies for about six months. i was having migranes for about two weeks. i dont think i used nasonex the whole two weeks. one morning i woke up and i couldnt see out of my right eye and my head fealt terrible. i hadnt been sleeping well, so i took an ibuprophen and had a cup of coffee and 20 minutes later, my sight had come back. the next morning i had the same problem, so i took and ibuprophen and waited. i waited all day and finaly at about 8 at night i went into the emergency room. i have been tested for every disease out there and i had no answers for why i lost my vision in the right eye. about six months later (when i very rapidly lost most of my vision in the left eye) i was diagnosed with chronic steroid dependent autoimmune optic neuritis. i have wondered thinking back if the nasonex was responsible for the steroid dependancy, but i guess there is no way to be sure. if anyone has anything to tell me or a simmilar story to tell me email me at ******