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Lactic Acid Dehydrogenase: About This Test

What is it?

The test for lactic acid dehydrogenase (LDH), also called lactate dehydrogenase (LD), measures the amount of this enzyme in your blood. LDH levels go up when there is damage to your cells.

Why is this test done?

LDH levels help find the cause of lung disease, lymphoma, anemia, and liver disease. They also help find out how well treatment for lymphoma is working.

How do you prepare for the test?

In general, there's nothing you have to do before this test, unless your doctor tells you to.

How is the test done?

A health professional uses a needle to take a blood sample, usually from the arm.

How long does the test take?

The test will take a few minutes.

What happens after the test?

  • You will probably be able to go home right away.
  • You can go back to your usual activities right away.

Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.

Where can you learn more?

Go to https://www.healthwise.net/patientEd

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