) Equioxx Oral Paste is a non-steroidal, anti-inflammatory drug for the control of pain and inflammation associated with osteoarthritis in horses. Equioxx Oral Paste contains firocoxib. Each syringe of Equioxx contains 6.93 grams firocoxib, sufficient to treat 1250 lbs. Equioxx Oral Paste is recommended for oral administration once daily for up to 14 days. Firocoxib.