Sirdalud (Tizanidine) is a muscle relaxant which helps to relax certain muscles in your body. It relieves the painful muscle spasms related to the static and functional disorders of the spine or following certain surgeries such as herniated intervertebral disc or osteoarthritis of the hip. It is also used to treat spasticity due to neurological disorders such as multiple sclerosis, chronic myelopathy, degenerative spinal cord diseases, cerebrovascular accidents, and cerebral palsy.