gammaCore Sapphire: Natural Migraine and Headache Relief If you're one of the millions of people worldwide who suffer from migraines or cluster headaches, you know just how debilitating these conditions can be. Unfortunately, traditional treatments like medication or surgery don't always work, leaving sufferers with little hope for relief. But now, a new device on the market could change everything. The gammaCore Sapphire is a non-invasive vagus nerve stimulator that offers