There are a lot of reasons for elevated AST results. They can range from acute diseases such as Hepatitis A to chronic diseases like Hepatitis C. In acute cases, the AST result can be in the thousands, while in chronic cases the AST can be only mildly elevated. Prolonged use of acetaminophen can cause permanent liver damage. Just taking one tylenol and then having a drink should not increase the AST to that level. The most common cause of mild to moderate elevations of these liver enzymes is fatty liver. In the United States, the most frequent cause of fatty liver is alcohol abuse. Other causes of fatty liver include diabetes mellitus and obesity. Chronic hepatitis C is also becoming an important cause of mild to moderate liver enzyme elevations. If your doctor is concerned, he/she will probably order additional testing from the lab to rule out certain liver diseases and diabetes. If your AST continues to be elevated, he/she may order MRI studies or even a liver biopsy. This is not a great forum to diagnose your condition. You need to write down your questions and concerns and then discuss them face-to-face with your doctor. Good luck and try not to worry too much until you find out what the cause is.
Retired medical professional