I'm under Pain Management for Back surgery. My doctor goes back and forth with these two meds. They both don't rally stop my pain. which is stronger for my pain in the back and sciatic area? I take 1 1/2 of the Percocet (per my doctor) and then Dilaudid 4mg when it is worse (per my doctor).Which is stronger for my pain-Dilaudid 4mg or Pecocet 10/325mg?