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

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In a statement handed out to reporters, Merck said that the class effect might extend beyond these Cox-2 inhibitors, to many older non-steroidal anti-inflammatory drugs.

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They are designed to cause less side effects in patients than the more common non-steroidal anti-inflammatory drugs (NSAIDS).

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Celebrex treats pain as well as other NSAIDS, or non-steroidal anti-inflammatory drugs, such as ibuprofen, naproxen and aspirin.

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Prescriptions for non-steroidal anti-inflammatory drugs in Denmark are for relatively large doses, equivalent to 400mg or 600mg of ibuprofen.

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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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Compared to the older, more traditional non-steroidal anti-inflammatory, it's almost surely at least as effective and at least as safe, but it's off patent, so it's not being pushed the same way.

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These compounds, by virtue of their mode of action, were deemed to be as potent arthritis pain relievers as traditional non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen, but were believed to be safer than NSAIDs since they caused less gastrointestinal distress.

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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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