Another advantage is that there's a 'antidote' to Acethaminophen:
http://en.wikipedia.org/wiki/AcetylcysteineTylenol is the prefered pain-killer over Aspirin, if used according to the instructions/doctor and WITHOUT ALCOHOL!
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''It's time for Plan B...'' ''We have a Plan B?'' ''No, but it's time for one.'' -Stargate SG-1