WORCESTER, Mass.--(BUSINESS WIRE)--RXi Pharmaceuticals Corporation (OTCBB: RXII.OB) announced today that the Financial Industry Regulatory Authority, Inc., also known as FINRA, has approved RXi Pharmaceuticals’ common stock for trading under the stock symbol “RXII” on the OTC Bulletin Board. RXi Pharmaceuticals anticipates its stock will be eligible for trading commencing today, May 10, 2012.