Can the "equivalent" of po 500 mg qid of tylenol (acetaminophen) (paracetamol) be administered by iv in someone who is nil by mouth?

Yes: Acetaminophen can be given IV or rectally for someone who cannot take medication by mouth.

Yes: Acetaminophen (the active ingredient in tyleno) is available as a rectal suppository or can be give by IV for those who can't take it by mouth.

Tylenol (acetaminophen): Hi, I'm not aware of any IV preparation for Tylenol (acetaminophen) but there are other pain medication that could be given IV.