Gamithromycin, sold under the brand name Zactran, is a veterinary medication used for the treatment of cattle, pigs, and sheep.

[6] It was approved for veterinary use in the European Union in 2008.

[3][4] In the EU, gamithromycin is indicated for the treatment and prevention of bovine respiratory disease in cattle, swine respiratory disease in pigs, and infectious pododermatitis (foot rot) in sheep.

[3][4][6] In the US, gamithromycin is indicated for the treatment of bovine respiratory disease in cattle.

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