QRxPharma (ASX: QRX and OTCQX: QRXPY) announced today successful completion of two Phase 1 studies in healthy volunteers for MoxDuo® CR, a controlled-release Dual-Opioid® utilising a 3:2 ratio of morphine and oxycodone. The proprietary MoxDuo CR formulation, encompassing both sustained delivery technology as well as abuse deterrent and tamper resistant features, is designed to provide at least 12 hours of analgesia in patients suffering from moderate to severe chronic pain including cancer, lower back, osteoarthritis and neuropathic pain. The clinical trials compared blood levels of MoxDuo CR's components to OxyContin® and MS Contin® and demonstrated MoxDuo CR's superior results, with sustained blood levels for up to 24 hours. Further studies indicated MoxDuo CR's increased resistance to tampering.
"The successful completion of these trials confirms the advantages of this formulation and enables QRxPharma to initiate Phase 2 Proof-of-Concept clinical studies mid-year 2012," said Dr. John Holaday, Managing Director and Chief Executive Officer of QRxPharma. "These data suggest MoxDuo CR may be positioned as a once or twice per day formulation for treating chronic pain, with the potential advantage of significantly reduced side effects as witnessed with immediate release MoxDuo. In the US alone, the chronic opioid pain market is a $6 billion a year opportunity."
Two Phase 1 trials were conducted in healthy volunteers to evaluate the rate at which key components of the MoxDuo controlled-release (CR) formulation were absorbed, distributed, metabolised and eliminated by the body. The first study compared MoxDuo CR (30mg morphine SO4/20mg oxycodone HCl) to the pharmacokinetic profiles of the same doses of MS Contin (30mg morphine SO4) and OxyContin (20 mg oxycodone HCl) in 10 healthy adult human subjects using a three-way crossover design. Pharmacokinetic results from the measurement of opioid blood levels over time revealed a MoxDuo CR profile consistent with expectations for a once to twice-daily formulation.
The second study demonstrated that food consumption does not alter the pharmacokinetic profiles of morphine and oxycodone from MoxDuo CR (30 mg/20 mg) tablets using a two-way crossover design with 17 healthy volunteers. To demonstrate the effects of chronic use on steady-state blood levels, this study also measured the repetitive-dose pharmacokinetic profiles of morphine and its metabolites as well as oxycodone during repetitive (twice daily) administration of MoxDuo CR tablets for 5 days.
The MoxDuo CR tablets used in these clinical tests included QRxPharma's proprietary Abuse Deterrence Formulation (ADF) technology. As an indication of tamper resistance, attempts to extract morphine or oxycodone by crushing and solubilising in water or alcohol resulted in very limited (less than 15%) drug recovery. In addition, the ADF technology did not impair human bioavailability of the opioids following oral administration.
"Clinical performance of the oral MoxDuo CR formulation clearly exceeded our expectations. When directly compared to OxyContin, the largest selling opioid for chronic pain, MoxDuo CR demonstrated superior bioavailabilty and sustained blood levels for over 12 hours, especially in the 12-24 hour time period. At steady-state, MoxDuo CR provided very low fluctuations of oxycodone. MoxDuo CR appears to be a true once or twice a day delivery system for dual opioids," said Dr. Ed Rudnic, Chief Operating Officer, QRxPharma. "We expect that MoxDuo CR's sustained blood levels, ADF attributes and potential side effect benefits will enhance the tolerability and acceptability of MoxDuo CR in the global chronic pain marketplace."
Pain reliever use in pregnancy shows no link to child neurodevelopmental disorders, study finds