Methods:In phase I, single-drop aqueous pharmacokinetics of topical bromfenac was estimated at 15 minutes, 30 minutes, 1 hour, 2 hours, 4 hours, 12 hours, and 24 hours using liquid chromatography mass spectrometry in 60 eyes. In phase II, 45 eyes undergoing phacoemulsification were enrolled: group I (control, n = 15), group II (once-daily bromfenac, n = 14), and group III (twice-daily bromfenac, n = 16). Intraoperative pupillary miosis, postoperative anterior chamber (AC) flare, Summed Ocular Inflammation Score (SOIS), central macular thickness (CMT), and pain scores were assessed. Follow-up was performed at 1 day, 7 days, 28 days, and 90 days postoperatively.Results: Half-life of topical bromfenac was 3.6 hours, mean residence time 5.5 hours, and peak concentration (63.73 ng/mL) achieved after 2 hours. Aqueous concentration was more than inhibitory concentration (IC 50 ) at 12 hours but not at 24 hours. Cumulative effect was observed with repeated dosing with aqueous levels more than IC 50 in once-daily and twice-daily groups at 5 days. Significant intraoperative miosis was observed in group I. Pain score, AC flare, and SOIS were significantly more in group I (P < .001) and comparable in groups II and III at all timepoints. CMT was comparable in all groups; no case developed cystoid macular edema.Conclusions: Single-dose topical bromfenac did not maintain therapeutic aqueous concentration over 24 hours; however, cumulative effect was observed with repeated dosing. Clinical efficacy of once-daily and twice-daily dosing was comparable.