Are you experiencing any of the following symptoms: extreme tiredness, loss of appetite, upset stomach, vomiting, yellowing of the skin or eyes, dark yellow urine, pale stools, pain in the upper right part of the stomach, or flu-like symptoms. If so these are signs of liver problems.
Are you drinking alcohol? Are you taking any medications? Such as acetaminophen (Tylenol, others); cholesterol-lowering medications (statins) such as atorvastatin (Lipitor), fluvastatin (Lescol), lovastatin (Mevacor), pravastatin (Pravachol), or simvastatin (Zocor); isoniazid (INH, Nydrazid); methotrexate (Rheumatrex); niacin (nicotinic acid); or rifampin.
The above info was found from http://medlineplus.gov/