If analgesics are ineffective, there are a number of muscle relaxants on the market that are commonly prescribed for back pain. These include Flexeril (cyclobenzaprine), Robaxin (methocarbamol), Skelaxin (metaxalone), Soma (carisoprodol). They are most effective in increasing mobility and alleviating pain for acute onsets of severe debilitating muscle spasms that accompany low back pain. These drugs are not indicated for long term relief and do not replace analgesia and exercise as the mainstay of back pain therapy.