Voltaren, manufactured by Novartis (nyse: NVS - news - people), is an older, non-steroidal anti-inflammatory drug.

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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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One of the four drugs used on this horse was a common form phenylbutazone that you probably recognize as as a Non-steroidal anti-inflammatory drug used for pain management in horses as ubiquitously used only through veterinarian controlled pharmaceutical sale to horse owner or trainer.

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