Tonix Pharmaceuticals Holding Corp. today announced that it has engaged Rho, Inc. (Rho), a global contract research organization (CRO), to support Tonix's preparation and planned submission of its New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) for the approval of Tonmya (cyclobenzaprine HCl sublingual tablets) for the management of fibromyalgia.