momz is a doctor. went to some conference. said when you take advil/tylenol it gets more intense by increments and then plateaus.
for instance if you take 1 it will kill 25% of the pain. 2 will kill 50%. 3 will kill 60%. 4 will kill 65%. 5 and beyond do very little, like 66%-69%
hope that makes sense (and those arent the real percentages, its just an example)