I have recently been changing over to AzaSite (Azithromycin) drops from Erythromycin ointment as my drug of choice for daily treatment of posterior blepharitis/Meibomian gland disease (MGD). It seems to be very well tolerated, is only once a day, and is reported to have anti-inflammatory properties, thus reducing the need for topical steroids. This is a difficult, annoying, chronic condition for so many patients, and I think they will be very grateful.