Totally get it, I too only understood it "theoretically" till I had a (fairly minor!) dental operation.

... 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.