Lactic Acid

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Taking large doses of the medicine epinephrine.
• Taking medicines, such as isoniazid for tuberculosis or metformin (Glucophage) for diabetes.
• Using a lot of acetaminophen (such as Tylenol) or alcohol.
• Exercising prior to this test.
• Clenching a fist while the blood sample is being drawn. Also, lactic acid levels may be higher if the tourniquet is around your arm for a long time.

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Author:	Maria G. Essig, MS, ELS	Last Updated: August 19, 2008
Medical Review:	Kathleen Romito, MD - Family Medicine Brian Leber, MDCM, FRCPC - Hematology
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