[onemuscledbeagle]

In addition to PT, Tramadol (not to exceed 400 mg/day), I would get an MRI of the Lumbar, Sacral discs. There certainly sounds like it is an impingment. If you were to press on the lateral side of the knee of the affected leg you should get a painful surge up your leg. This is positive for impingment. Rather it is just a nerve root that is involved or a disc bulging you might benefit from epidural injections of steroids to take the imflammation down. It is localized and not systemic therefore not a concern for the liver.