SYDNEY, Australia and BEDMINSTER, N.J., July 23 /PRNewswire-FirstCall/ -- QRxPharma Limited (Pink Sheets: QRXPY - News; ASX: QRX - News) announced today the initiation of a Phase 2 comparative proof-of-concept study to evaluate the efficacy and safety of MoxDuo(TM) IV (intravenous morphine and oxycodone) versus IV morphine alone for the treatment of moderate to severe post-operative pain in patients following hip replacement surgery. Data from this study will serve as a significant predictor of MoxDuo(TM) IV’s clinical benefits and provide guidance for the design of further clinical trials leading to submission of an NDA to the US Food and Drug Administration (FDA) within the next three years.