Use of Methacetin Breath Test to Predict Liver Failure in Patients With Cirrhosis

Inclusion criteria: 1. Being considered for placement or already on the liver transplantation waiting list 2. Cirrhosis caused by any cause of chronic liver disease. 3. Age \> 18 years Exclusion criteria: 1. Known or suspected hepatocellular carcinoma 2. Prior TIPS placement 3. Severe congestive heart failure 4. Severe pulmonary hypertension 5. Uncontrolled diabetes mellitus (HBA1C \>9.5%) 6. Any autoimmune disorder, which is currently being treated with prednisone or any other immune suppressive medication. 7. Previous surgical bypass surgery for morbid obesity (BMI \>45) 8. Extensive small bowel resection 9. Patients currently receiving total parenteral nutrition if they have contraindications to oral drugs 10. Women who are pregnant 11. Patients who are allergic to acetaminophen/ paracetamol or any other related medications 12. Patients with an acute current exacerbation of chronic obstructive pulmonary disease or bronchial asthma. 13. Patients that are taking hepatotoxin drugs 14. Patient, based on the opinion of the investigator, should not be enrolled into this study 15. Patient is unable or unwilling to sign informed consent. 16. Patients that are participating in other clinical trials evaluating experimental treatments or procedures