Firocoxib) belongs to the coxib class of non-narcotic, non-steroidal anti-inflammatory drugs. Firocoxib is a white crystalline compound described chemically as 3-(cyclopropylmethoxy)-4-(4-(methylsulfonyl)phenyl)- 5,5-dimethylfuranone. The empirical formula is C17H20O5S, and the molecular weight is 336.4. The structural formula is shown below: