Lab Tests

How do I prepare for an electromyogram (EMG) and nerve conduction studies?

A Answers (1)

  • AHealthwise answered

    Tell your doctor if you:

    • Are taking any medicines. Certain medicines that affect the nervous system can change electromyogram (EMG) results. You may need to stop taking these medicines 3 to 6 days before the test.
    • Have had bleeding problems or take blood thinners, such as warfarin or heparin. If you take blood thinners, your doctor will tell you when to stop taking them before the test.
    • Have a pacemaker.

    Do not smoke for 3 hours before the test.

    Do not eat or drink foods that contain caffeine (such as coffee, tea, cola and chocolate) for 2 to 3 hours before the test.

    Wear loose-fitting clothing so your muscles and nerves can be tested. You may be given a hospital gown to wear.

    You may be asked to sign a consent form that says you understand the risks of the test and agree to have it done.

    Talk to your doctor about any concerns you have regarding the need for the test, its risks, how it will be done or what the results will mean.

    This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. To learn more visit

    © Healthwise, Incorporated.

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