SYDNEY, Australia and BEDMINSTER, N.J., Aug. 26 /PRNewswire/ -- QRxPharma Limited and announced today successful completion of its pilot study to evaluate the analgesic efficacy and safety profile of MoxDuo(TM) IR (immediate release) capsules in patients with moderate to severe pain following total knee replacement surgery. When compared at equianalgesic doses with Percocet®, the second most widely prescribed opioid in the US, MoxDuo(TM) IR demonstrated greater overall tolerability with substantially fewer incidences of moderate to severe nausea, vomiting, constipation, and hypotension than Percocet®. Scheduled for launch in 2011, MoxDuo(TM) IR targets the acute pain market, a $2.5 billion segment of the $7 billion spent annually on prescription opioids in the US.