azithromycin 500 dose for adults ear infection azithromycin 500 dose for adults twice a day azithromycin 500 dose for adults 3 days azithromycin 500 dose for adults bronchitis azithromycin 500 dose for adults sinus infection azithromycin 500 dose for adults pneumonia azithromycin 500 dose for adults for throat infection azithromycin 500 dose for adults od or bd azithromycin 500 dose for adults per day azithromycin 500 dose for adults