Ketorolac is relatively COX-1 selective while bromfenac is potently selective for COX-2 over COX-1. In the animal model, both ketorolac 0.4% and bromfenac 0.09% demonstrated maximal anti-inflammatory activity in treated eyes. Only bromfenac 0.09% had a significant effect on the contralateral eye, suggesting possible systemic absorption of this drug.

All three NSAIDs penetrated into the vitreous cavity. Topical therapy with ketorolac may lower preoperative vitreous prostaglandin E(2) levels, which may have a clinical impact on the management of prostaglandin-mediated diseases, including cystoid macular edema.

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Ketorolac 0.45% achieved the greatest inhibition of PGE(2) compared to nepafenac 0.1% and bromfenac 0.09%. Ketorolac 0.45% may be more efficacious at controlling inflammation at the time of cataract surgery versus nepafenac 0.1% and bromfenac 0.09%.