The Effect of Acetaminophen on Non-alcoholic Fatty Liver Disease Patients
The Effect of Acetaminophen on Non-alcoholic Fatty Liver Disease Patients
In this first pilot study, we will examine the effects of acetaminophen dosing in adult
 patients with NAFLD in comparison to the effects in a healthy control group. Both groups will
 receive 3 grams (g) of acetaminophen, the maximum recommended daily dose, daily for 14 days.
 We hypothesize that NAFLD patients are more prone to APAP toxicity than normal
 controls.Treatment will be stopped after two weeks or in the following conditions:

 Treatment with APAP will be stopped in healthy volunteers if ALT and/or AST reached three
 times the ULN. In patients with NAFLD, treatment will be stopped if: ALT or AST reach ≥ three
 times the upper limit of entry value or ≥ 5 times the ULN; or if there is ALT or AST >3 times
 ULN and TBili >2xULN or INR >1.5; or if there is ALT or AST >3 times ULN with the appearance
 of fatigue, nausea, vomiting, right upper quadrant pain or tenderness, fever, rash, and/or
 eosinophilia (>5%). We follow a conservative approach derived from the FDA guidelines for
 stopping medications expected to cause drug induced liver injury (DILI). Indeed, the FDA
 allows continuation of the medication until ALT or AST are >8x ULN in the absence of elevated
 Tbili or INR. Patients who have hepatotoxicity will have close monitoring of their liver
 enzymes until they normalize. Taking acetaminophen up to 3g daily has been shown to be safe
 and acceptable. We have followed very strict criteria for monitoring and stopping rules
 however in the usually cases of toxicity the patient will be admitted for monitoring.
NAFLD patients:

 Inclusion criteria:

 1. "Presence of NAFLD": This will be defined by the presence of at least two of the
 following criteria: (a) suggestion of liver fat by an imaging study (ultrasound, CT
 scan, MRI or MR spectroscopy) performed in the 6 months prior to enrollment; (b)
 elevated aminotransferase levels (ALT > 31 U/L for men or > 19 U/L for women, or AST >
 30 U/L) on at least two occasions in the 6 months preceding enrollment; and (c)
 presence of the metabolic syndrome, defined according to the modified AHA/NCEP
 criteria. Biopsies are not required; however, previous biopsy done within the 6 months
 prior to the initiation of the study will be considered diagnostic if typical findings
 of NAFLD are described and other causes of liver disease are ruled out;

 2. Individuals who are 18-70 years old;

 3. Written informed consent.

 Exclusion criteria:

 1. Serum ALT > 3 times ULN at baseline.

 2. Evidence of another form of liver disease including viral hepatitis, autoimmune
 hepatitis, cholestatic liver disease, Wilson's disease, Alpha-1-antitrypsin
 deficiency, hemochromatosis or DILI.

 3. History of excess alcohol ingestion, averaging more than 30 gm/day (3 drinks per day)
 in the previous 10 years, or history of alcohol intake averaging greater than 10
 gm/day (1 drink per day: 7 drinks per week) in the previous one year.

 4. Evidence of liver cirrhosis on labs or imaging.

 5. History of gastrointestinal bypass surgery or ingestion of drugs known to produce
 hepatic steatosis in the previous 6 months.

 6. Significant systemic or major illnesses other than liver disease.

 7. Positive test for anti-HIV.

 8. Active substance abuse.

 9. Pregnancy or inability to practice adequate contraception in women of childbearing
 potential

 10. Evidence of hepatocellular carcinoma.

 11. Any other condition which, in the opinion of the investigators, would impede
 competence or compliance.

 12. Serum creatinine >1.5 mg/dl.

 13. Starting medications that have been shown to cause drug induced liver injury (eg,
 augmentin, statins.) within one month prior to enrollment. Medications that have been
 known to cause DILI but have taken for more than one month prior to enrollment (such
 as statins) should not be an exclusion.

 Healthy Controls:

 Inclusion criteria:

 1. Individuals who are 18-70 years old

 2. Normal Liver enzymes

 3. Negative hepatitis B surface antigen, and hepatitis C antibody

 4. BMI (18.5 - 24.9) kg/m2

 5. Written informed consent.

 Exclusion criteria:

 1. Presence of the metabolic syndrome, defined according to the modified AHA/NCEP
 criteria

 2. Taking concomitant medications