experiencing some pretty severe muscle weakness in my thigh muscles. It is scaring me as I do not see this as a side effect from anyone here and I am afraid something else is going on? It is to the point I cannot stand up on my own without holding on to something to pull myself up with my arms from a sitting position. Any input greatly appreciated. I have numerous herniated discs in my back, deemed inoperable by neurosurgery, and for past year til right before Christmas achieved very good pain control with epidural steroid injections. My pain management MD says can only do 3 every 6 mo and will not do anymore at present for some reason (it has been since OCT that she has done any) Anyway, just giving background as to why I have been prescribed this med. Notice lots of weight gain in short time as well.