•The normal range for serum amylase is 25-120 U/L. Levels at least 3 times the reference range is indicative of acute pancreatitis.
•In chronic pancreatitis, serum amylase levels are generally slightly elevated. Amylase levels are only slightly elevated because of pancreatic atrophy, causing a decrease in amylase production and storage.
•75U/L and 25U/L are within the normal range.
•200U/L is only slightly elevated, and may be present in chronic pancreatitis.