I have found that meds make my feet and legs very heavy. If I cut out the lyrica the burn comes back hard but I also have more sensation in my feet and the brain signal that says move your leg isnt delayed. Also water retention adds weight to the legs , feet requiring more effort IMO.
All vey stressfull since we dont really know when to stop/start blaming P.N on everything. My mum recently died of cancer and being a chronic sufferer of P.N she, just blamed the symptoms on that and kept increasing pain meds. On a lighter note she was thrilled to be on morphine and pain free first time in 20 years