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Do not use Headache Killer™ if any of the following are present:
  • Excessive or undesirable pain during use,
  • Dizziness, vertigo, or lightheadedness,
  • Pregnancy (use at your own risk),
  • Os Odontoideum,
  • Bow Hunter's Syndrome,
  • Taking blood thinners,
  • Previous neck surgery,
  • Chiari Malformation,
  • Down's Syndrome,
  • History of aneurysm or stroke,
  • Vertebrobasilar Insufficiency (VBI), or
  • Carotid Sinus Hypersensitivity (CSH)