Electrocore LLC won 510(k) clearance from the U.S. FDA for its noninvasive vagus nerve stimulation (VNS) device, Gammacore, to alleviate acute pain from migraine in adults. The expanded label was approved after Gammacore received clearance for episodic cluster headache in adults in early 2017. The handheld prescription device is applied to the neck to stimulate the vagus nerve through the skin, and was backed by its recent PRESTO study.