How you prepare

By Mayo Clinic Staff

To prepare for an EEG:

  • Wash your hair the night before or the day of the test, but don't use any conditioners, hair creams, sprays or styling gels.
  • Avoid anything with caffeine six hours before the test.
  • Take your usual medications unless instructed otherwise.

If you're supposed to sleep during your EEG test, your doctor may ask you to sleep less or even avoid sleep entirely the night before your EEG. If you have trouble falling asleep for the test, you might be given a sedative to help you relax.

May. 19, 2011