Aceclofenac + Paracetamol + Chlorzoxazone is a combination of two pain-relieving medicines (Aceclofenac and Paracetamol ) and a muscle relaxant ( Chlorzoxazone). The pain-relieving medicines block the release of certain chemical messengers in the brain that cause pain and inflammation (redness and swelling). The muscle relaxant works on the brain and spinal cord centers to relieve muscle stiffness or spasm, thereby improving muscle movement.