Actually I have been having the pain at that back f my legs since 10 years.Recently the pain in my hamstrings has increased a lot and has caused a lot f weakness in my legs. Mostly the doctors have diagnosed it as fibromyalgic pain and have prescribed me duloxetine 20 mg and and pregabalin 75 mg. One doctor had prescribed me tolpeserone 450 mg. But the relief is not very long lasting and the pain keeps on returning . I wanted to know how long will this treatment last and is there a better muscle relaxant i can take