Wow, that is a huge amount of Acetaminophen which really is pretty horrible for your liver, and I'm certainly hoping you're not drinking any alcohol(ETOH) in addition.

I really don't want to be a harpy but that is just a huge amount of that drug. As a former heavy drinker I'm just really frightened to take almost any amount (this is not to say I never take any) of Tylenol just because of it's negative liver impact if taken too frequently or in high doses.

I'd suggest you talk to your GP about this pronto and find an alternative ASAP.

Good luck.