I didn't until I had a bulging lower back disc pressing on my sciatic nerve. My leg felt like it was constantly on fire no matter what position I put myself in. In the past I've torn my ACL and had surgery to reconstruct and that pain was like stubbing my toe compared to the back pain. I understood how people become addicted to pain meds after my back situation.
... Suddenly I'm maintaining a continuous note of when I'm taking which medicine to avoid crossing safe limits (which I anyway was crossing most days).
I was only told to take 2 paracetamols a day (bullshit dose, I'd be waking up from the pain even with more pain meds).
"Diclofenac for rare use" - well, if nothing else is touching the pain, is it an emergency?
Eventually after forever I was able to transition to Ibuprofen + paracetamol. And I already have a health condition which is heavy on my kidneys... pain management can be absolutely crazy.
Fun fact, you can totally get them to pause the procedure without saying a word. All you have to do is end up in a lot of pain, have your heart rate skyrocket like anything, and get everyone in the OT very concerned ;)
Speaking as someone who is not-infrequently in significant pain, I sincerely hope that you never have to.