Yes, Flexon and Flexon MR are two different medicines. Flexon tablet contains two components, namely Ibuprofen and Paracetamol. It is used to provide relief from pain and also lower fever and inflammation. Flexon MR contains three components, namely Paracetamol, Ibuprofen, and Chlorzoxazone. Chlorzoxazone is a muscle relaxant. Flexon MR helps relieve musculoskeletal pain and swelling associated with a sprain, muscle spasm, or muscle injuries like a twist in the ankle, muscle cramps, etc.