i assume you are treating pink eye (conjunctivitis). the course of therapy can be anywhere from 5-10 days depending on the severity and response to this antibiotic. a good "average" would be a week but it is best to use it for a day or two longer than it takes your problem to completely resolve. this stuff tends to burn so my heart goes out to you.
how long should we usesulfacetamide sodium ophthalmic