I Have Spinal Stenosis, Spondeolisthisis W/instability And Degenerative Disc Disease

I have spinal stenosis, spondeolisthisis w/instability and degenerative disc disease in L4/L5. I am awaiting surgery soon, but in the interim, I have had 2 nerve blocks, an ablation of L2-5 & S1. The pain docs have me on oxycodone (which I only take at night) and Lyrica 25mg and Robaxin 750 both night and day. I need to function and don't like being loopy....so I just take 4 Advil every 4 hours. My question is: which drug - Lyrica or Robaxin would make me less dizzy? Jill