Along with Vitamin B3 deficiency(Niacinimide or Inositol Hexanicotinate Non flushing), Vitamin B6,Manganese, Selenium, Iron and Zinc deficiencies are usually present, as well, and are frequently the cause for pychiatric disorders of all kind. Namely, Pyroluria (aka. copper toxicity) a disorder which is subject to the above and cause of anxiety/panic disorder.
Alternatively you can seek out an Orthomolecular MD
in your area to help you who can administer your deficiencies with high therapeutic doses to repair your body.