How often do you use polymyxin b sulfate and trimethoprim solution for pink eye?

Polymyxin B sulfate and trimethoprim solution is not typically used for pink eye (conjunctivitis). It is an antibiotic eye drop used to treat bacterial eye infections caused by susceptible organisms. Depending on the severity of the infection, this could range from few to several times a day for a week or more. Please consult a healthcare professional if you are using this medication.