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FDA Conditionally Approves Merck Animal Health's EXZOLT™ CATTLE-CA1 for the Prevention and Treatment of New World Screwworm (Cochliomyia hominivorax) Larvae (myiasis)

RAHWAY, N.J., December 04, 2025--Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced the U.S. Food and Drug Administration (FDA) has granted a conditional approval for EXZOLT™ CATTLE-CA1 (fluralaner topical solution). This innovative product is in the newest class of parasiticides known as isoxazolines. The pour-on solution is effective for the prevention and treatment of infestati

articleMerck & Company, Inc.December 4, 20256/company/merck-and-company-inc/news/fda-conditionally-approves-merck-animal-healths-exzolttm-cattle-ca1-for-the-prevention-and-treatment-of-new-world-screwworm-cochliomyia-hominivorax-larvae-myiasis
FDA Conditionally Approves Merck Animal Health's EXZOLT™ CATTLE-CA1 for the Prevention and Treatment of New World Screwworm (Cochliomyia hominivorax) Larvae (myiasis)

About this update from Merck & Company, Inc.

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More updates from Merck & Company, Inc.

Merckconditional approvalprevention and treatmentNew World screwwormbeef cattleAnimal Healthconditionally approvedCochliomyia hominivoraxcattle producersFDA