• One- or two-gram doses of ceftriaxone were administered intravenously to 30 patients before cataract extraction. With the 1-g dose, mean aqueous humor concentrations of 0.93 and 0.88 μg/mL were found at approximately 2 and 12 hours after administration, respectively. With the 2-g dose, a mean level of 2.47 μg/mL was observed at two hours; levels of more than 2 μg/mL were found in two patients 13 hours after administration. Both the 1- and 2-g doses thus produce aqueous humor levels many times higher than the minimum inhibitory concentration of ceftriaxone for 90% of most Enterobacteriaceae, excluding Pseudomonas. Concentrations adequate for Staphylococcus aureus and Staphylococcus epidermidis were not, however, obtained.
Axelrod JL, Newton JC, Sarakhun C, Lester RD, Merhige K, Peck RL, Francomano TJ, Sheikh MZ. CeftriaxoneA New Cephalosporin With Aqueous Humor Levels Effective Against Enterobacteriaceae. Arch Ophthalmol. 1985;103(1):71-72. doi:10.1001/archopht.1985.01050010075024