Black Box Warning
BOXED WARNING Hepatotoxicity Acetaminophen has been associated with cases of acute liver failure, at times resulting in liver transplant and death. Most of the cases of liver injury are associated with the use of acetaminophen at doses that exceed 4000 milligrams per day, and often involve more than one acetaminophen containing product.
What this means:A black box warning is the FDA's strongest required safety notice. It signals a serious or life-threatening risk. Patients should review this with their prescriber before starting, continuing, or switching Butalbital, Acetaminophen, And Caffeine.