Dantrolene is used for neurological conditions like multiple sclerosis and cerebral palsy
. Rapid muscle contraction is more sensitive as compared to a muscle which contracts gradually. Dantrolene can have major effects like normal muscle weakness, sedation, and hepatitis in some cases. Carisoprodol, metaxalone, cyclobenzaprine and methocarbamol are commonly used for myofascial pain syndrome, fibromyalgia, low back and neck pain.