<s>[INST] Hi my ALT and AST levels are quite high. As of Jan 20th 2015 my AST WAS 423 and my ALT was 164. LDH: 935.Last November 2014 I had a AST level of 21 and a ALT of 37. What could be the cause of this drastic change in levels. I did drink some cocktails(capt coke) the night before my appointment, although I did fast 8hours prior to the appointment as told. Heading to the appointment I was running on about 3 hours of sleep and I did take a 5 hour energy drink.From what I remeber in my first initial blood draw I didn t eat or drink and my levels were fine. Can these numbers change that dramatically over one night? I m healthy, about 6 180lbs. Rarely drink, and I seem to think I have a healthy diet. Going in next week for another blood draw and HEP screening. Any ideas what could be wrong and what I can do to possible lower these levels? [/INST] Hi, dairy have gone through your question. I can understand your concern. You have high level of liver enzymes. AST and ALT levels are high in liver damage. It may be due to viral hepatitis, alcohol, Chat Doctor.  You should go for complete liver function test. It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>