I was rushed to the ER with an excruciating condition, and i popped quite a bit of ibuprofen at home before going to the hospital (i think 4-6?). Nothing.
In the triage room or whatever, that morphine drip (plus saline IV to replace all fluid i vomited up due to pain) made the 8/10 pain reduce to a 2-3/10, allowing me to bear with it until i was put under general anesthesia for surgery.