What is "fenbufen"

n. A nonsteroidal anti-inflammatory drug used primarily to treat inflammation in osteoarthritis, ankylosing spondylitis, and tendinitis.

Fenbufen is a non-steroidal anti-inflammatory drug in the propionic acid derivatives class.

It was introduced by American Cyanamid under the trade name Lederfen in the 1980s and was withdrawn from markets in the developed world due to liver toxicity in 2010.

As of 2015 it was available in Taiwan and Thailand under several brand names.