I used nasonex for a month feb 2006 and experienced terrible insomnia and palpatations at night and i also had optic neuritis in my left eye. Is the ON to do with tiredness from not sleeping. All stopped once nasonex stopped. Taken beconase since, however i have had a sinus infection and optic neuritis again april 2007. Is there a relationship between corticosteroids and optic neurits?