Firocoxib, sold under the brand names Equioxx and Previcox among others, is a nonsteroidal anti-inflammatory drug of the COX-2 inhibitor (coxib) class, approved for use in horses (Equioxx) and for use in dogs (Previcox). Firocoxib was the first COX-2 inhibitor approved by the U.S. Food and Drug Administration for horses. Firocoxib is not intended or approved for use in human medicine.