I have a slight buldge in my L5 in my back. I've had an epidural injection and 2 sets of joint injections. They helped some but now I'm back to pain. Dr has me on Neurontin, today will be 8 days. He has me on 300mgs 2x a day. At times I think it's working and today I have pain that goes from my hip down my leg. How long before this works? I'm an impatient patient.