VETERINARY COMPOSITION COMPRISING A MACROLIDE ANTIBIOTIC, A VITAMIN B2 COMPOUND AND A PHENOL

A method of preventing a macrolide antibiotic from decomposing in the presence of a vitamin B2 compound, in drinking water or in feed intended for poultry or livestock, comprising the step of incorporating 0.5 to 20 parts by weight of a phenolic compound represented by the general formula **(See formula)** where R1 signifies a hydrogen atom or a methoxy or carboxyl radical; R2 signifies a hydrogen atom, or a hydroxyl or carboxyl radical, in one part by weight of the vitamin B2 compound and 1 to 200 parts by weight of the macrolide antibiotic and, furthermore, the operation of dissolving the resulting composition in water to make that the concentration of the macrolide antibiotic is 0.00001 to 0.1% or dissolving the resulting composition in water and adding the aqueous solution to feed to make the concentration of the macrolide antibiotic be 0.00002 to 0.2 %. (Machine-translation by Google Translate, not legally binding)