You should not eat, smoke, or consume caffeine within 8 hours of your VNG balance test, and we recommend that you do not wear any make-up. You should not be taking the following types of medications prior to your test: vestibular (dizziness) suppressants such as meclizine, antihistamines, pain relievers, and antidepressant, anti-anxiety, or sedative medication which you have been using for less than 8 weeks. Do not stop taking any prescription medication without consulting the physician who prescribed it for you.