Been on this medication about 3 months, but take it only at bedtime. I have Periodic Limb Movement and take Mirapex to stop the jerking at night, but have breakthrough movements. This medication was given to help me sleep thru those movements because taking more Mirapex was not a good option. Recent sleep study showed marked improvement. Also take low dose of Neurontin for neck pain. I read that some have tortured nights. That was me before the medication. Before diagnosed with the Periodic Limb Movement, if I took certain cold medicines or caffeine at night, my brain felt like a war zone, I was fitful and agitated, writhing mercilessly in the bed, stuck somewhere between awake and asleep. When taking Sinemet this happened if I wasn't real careful. Now I sleep pretty good for about 5 hours - almost a miracle. If you are a restless sleeper (not a wide awake insomniac) check for underlying sleep disorder before giving up on a pain med that is working for your pain.