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Zilmax® Information Center

The following information is in response to recent questions about Zilmax®. It is intended for our customers and interested groups who are involved in animal husbandry and well-being.

The benefits and safety of Zilmax® (zilpaterol hydrochloride) are well documented and the product has a 30+ year history of research and development and rigorous testing. Worldwide regulatory agencies have reviewed extensive data on Zilmax and have concluded that use of Zilmax, according to the label, is safe in cattle. It is important to understand these data included rigorous animal health safety and well-being studies – conducted by university experts – that found the behavior and movement of cattle fed Zilmax is normal.

Zilmax has a withdrawal period 3 days prior to harvest. Not for use in animals intended for breeding. Do not allow horses or other equines access to feed containing zilpaterol. Do not use in veal calves. For complete safety information, refer to product label and Zilmax website.

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This video was recorded during a Merck Animal Health-funded animal movement and AMI-like audit at a large Oklahoma feedlot and commercial packing plant by a PAACO-trained auditor, U.S. on Nov. 13, 2011. The results of this audit demonstrated no differences between Zilmax-fed animals and control in lameness scores.

For more information about the numerous studies confirming Zilmax’s safety and well-being profile, see Merck Animal Health Scientific Studies on Animal Safety and Well-Being.