Diclofenac is a non-steroidal anti-inflammatory drug whose veterinary use on livestock in South Asia has grown rapidly in recent years.

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Sudan is "fully prepared to provide information to the Council, or to any other body mandated by it" to show that the factory was producing medicines for human and veterinary use.

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However, the FDA had received reports that the drug was associated with hemorrhagic stroke in young women and completely removed it from the market in 2005 (although it can still be purchased for veterinary use).

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Phenylbutazone is a veterinary medicine whose use in livestock, including horses, is illegal.

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Neither the British Veterinary Association (BVA) nor the British Small Animal Veterinary Association (BSAVA) support the use of the devices, the document said.

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The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices.

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Since then, and "despite extensive communications between FDA and appropriate Chinese authorities to correct the problem, we have continued to find residues of certain veterinary drugs or food additives that are not permitted for use in the United States, " she added.

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While horsemeat itself is not considered a food safety risk, its unauthorized use in certain products has raised concerns it could contain the veterinary drug phenylbutazone, or "bute, " commonly used to treat horses.

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