I have been suffering with a bludging disc that is causing sciatic pain in my right buttock, thigh, and calf for 8 months. I had a guided epidural which failed to work, went to PT for a week which make thing worse. I went to the docotor today and he prescribed; neurontin 100mg alsong with decadron 4mg. Today was first day taking meds, and tonight I cannot sleep because my muscles in body are restless, I cannot get comfortable. Is this a common side effect or is this another issue completely? Thank you for your time and advise.