Yes. 4g is generally considered perfectly safe and is fairly commonplace dosing. 7g can kill you. Hence a therapeutic index of < 2.
This is why you have to be very, very careful. If you're doing 8 500mg Tylenol pills and then you also do 6 doses of DayQuil or Mucinex without realizing it's also acetaminophen, you can end up needing a liver transplant.
I wonder why it is not a more commonplace useage for suicides. Females seem to enjoy overdoes more, and men seem to enjoy violent ways. But female sucicides often "fails", seems like eating a box of Tylenols (here they come in 20 packs) would solve the "being alive" issue quite quick, no? Better not tip people off... :)
>end up needing a liver transplant
You won't get one nor should you get one if the reason is this.