Question: what are causes of liver failure?
Answer: Acetaminophen overdose. Taking too much acetaminophen (Tylenol, others) is the most common cause of acute liver failure in the United States. ... 
Prescription medications. ... 
Herbal supplements. ... 
Hepatitis and other viruses. ... 
Toxins. ... 
Autoimmune disease. ... 
Diseases of the veins in the liver. ... 
Metabolic disease.