ADVIL utilizes IBUPROFEN as the active ingredient
ALEVE utilizes NAPROXEN SODIUM for its active ingredient
people respond differently to each active ingredient- for some people ibuprofen doesn't have any effect but the naproxen does- or vice versa.
both ingredients relieve pain, but they also help reduce inflammation - just different recipes for pain relievers.
according to the commercials you will only need two aleve tablets every 12 hours as opposed to 2 advil every 4 hours.
They both help with the same thing pretty much.
I think aleeve is stronger.