The drug, Journavx by Vertex Pharmaceuticals, blocks pain signals to the brain, making it nonaddictive. The drug, Journavx by Vertex Pharmaceuticals, blocks pain signals to the brain, making it nonaddictive. Pain-Relieving Drugs, Drugs (Pharmaceuticals), Brain, Regulation and Deregulation of Industry, Opioids and Opiates, Clinical Trials, Placebos, Addiction (Psychology), Research, Vertex Pharmaceuticals Inc, Food and Drug Administration NYT > Science