The normal value of glutamic aminotransferase in liver function is between 0 and 40 U/L. If the patient’s transaminase is above 40 U/L, the patient should be considered to have elevated transaminase, and if the patient is considered to have liver damage, the patient should be observed for other diseases. To see if the patient has chronic viral hepatitis, including chronic viral hepatitis B and chronic viral hepatitis C, the patient needs to take blood for hepatitis B triple system and hepatitis C antibody accordingly to see if the patient has hepatitis B and C. If viral hepatitis is ruled out, it is mostly considered that the patient has had alcohol, medication, late nights, exertion and other related life status changes in the week prior to the blood draw, all of which can cause the patient to have elevated glutamate transaminase and glutamic oxalacetic transaminase. However, this elevation is also called functional liver impairment, or transient liver impairment. As long as patients actively change their daily life style and take appropriate medications to lower transaminases, such as bupropion drops, liver function will return to normal in about 7-10 days.