What is a commonly used antibiotic drop for bacterial conjunctivitis?

Polymyxin B-trimethoprim is a commonly used antibiotic drop for treating bacterial conjunctivitis, particularly in the outpatient setting. This combination takes advantage of the antibacterial properties of polymyxin B, which targets the cell membrane of gram-negative bacteria, and trimethoprim, which interrupts bacterial DNA synthesis. This dual action makes it effective against a broader spectrum of pathogens commonly associated with conjunctivitis, particularly those found in the typical clinical presentations.

Additionally, the use of polymyxin B-trimethoprim in eye care is favored due to its relatively low incidence of ocular toxicity and its ability to achieve therapeutic levels in the eye tissues, which are critical factors in the effective management of bacterial conjunctivitis. It is a well-established and widely adopted treatment option in clinical practice, often prescribed for both adults and children.