Vertex Pharmaceuticals (VRTX) announced positive results from three late-stage studies on its investigational orally-administered non-opioid pain medicine, VX-548, to treat moderate-to-severe acute pain.The company evaluated VX-548, a novel first-in-class NaV1.8 inhibitor, in two pivotal phase III acute pain studies — one following bunionectomy surgery and the other following abdominoplasty surgery. The studies achieved their primary endpoint — treatment with VX-548 showed a significant reduction in pain in ...