Hello mums can anyone help. my 15 daughter has had conjunctivitis with no known cause (all tests come back negative for bacterial infection) for nearly a year been to eye hospitals the lot. much better than it was but still there. don't like conventional medicine but nothing alternative worked so have tried antibiotics and steroid eye drops and not worked either. now eye docs suggest a one off 1000mg dose of azithromycin a drug normally used to treat STD's. She is completely sexually inactive and no i'm not being naive. i really don't want to give a systemic antibiotic like this but perhaps i should if it will work. list of side effects are terrifying. has anyone else used it or found any other cures? would love some advice