(Merial) Previcox is used for the control of pain and inflammation associated with osteoarthritis and for the control of postoperative pain and inflammation associated with soft-tissue and orthopedic surgery in dogs. Previcox Chewable Tablets contain firocoxib, a coxib-class, non-steroidal, anti-inflammatory drug (NSAID). The recommended dosage of Previcox Chewable Tablets is 2.27 mg/lb of body weight once daily. Previcox Chewable Tablets can be administered with or without food. Firocoxib.