When scheduling this test, your doctor will ask about conditions, medications, or behaviors that might affect the results.

These include:

• alcohol abuse
• use of certain neurologic medications, such as muscle relaxants, opioids, or psychotropic medications
• diabetes
• hypothyroidism
• systemic diseases

It is also important for your doctor to know if you have a pacemaker. The electrodes used in the NCV test may affect the electronic impulses of your medical device.

Do not use any lotions or oils on your skin a few days before the test. They can prevent the electrode from being properly placed on the skin. Fasting usually isn’t necessary, but you may be asked to avoid caffeine beforehand.