Amylase is an
A test can be done to measure the level of this enzyme in your blood.
Amylase may also be measured with a urine test. See
How the test is performed
A blood sample is needed. For information on how this is done, see:
How to prepare for the test
No special preparation is needed. However, you should avoid alcohol before the test. The health care provider may ask you to stop taking drugs that may affect the test. NEVER stop taking any medications without first talking to your doctor.
Drugs that can increase amylase measurements include:
Birth control pills
Opiates (codeine, meperidine, morphine)
How the test will feel
When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.
Why the test is performed
This test is most often used to diagnose or monitor
The test may also be done for the following conditions:
Chronic pancreatitis Pancreatic pseudocyst
The normal range is 23 to 85 units per liter (U/L). Some laboratories give a range of 40 to 140 U/L.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.
What abnormal results mean
Increased blood amylase levels may occur due to:
Acute pancreatitis Cancer of the pancreas, ovaries, or lungs Cholecystitis
- Gallbladder attack caused by disease
- Gastroenteritis (severe)
- Infection of the salivary glands (such as
mumps) or a blockage Intestinal blockage Macroamylasemia
- Pancreatic or
bile duct blockage Perforated ulcer Tubal pregnancy(may have burst open)
Decreased amylase levels may occur due to:
- Cancer of the pancreas
- Damage to the pancreas
- Kidney disease
Toxemia of pregnancy
What the risks are
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling light-headed
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)