Diclofenac is a non-steroidal anti-inflammatory drug (NSAID) which works by blocking the release of certain chemical messengers in the brain that cause pain and inflammation (redness and swelling).  Thiocolchicoside is a muscle relaxant. It works on the centers in the brain and spinal cord to relieve muscle stiffness or spasm and improve movement of muscles. Thiocolchicoside and Diclofenac together relieves muscle pain.