REDWOOD CITY, Calif., April 12, 2012 /PRNewswire/ -- AcelRx Pharmaceuticals, Inc. (Nasdaq: ACRX), (AcelRx), a specialty pharmaceutical company focused on the development and commercialization of innovative therapies for the treatment of acute and breakthrough pain, today reported dosing of the first patient in the second of three planned Phase 3 studies that will form the basis of a planned New Drug Application (NDA) for the Sufentanil NanoTab® PCA System, ARX-01. Utilizing a multicenter, randomized, open-label, parallel-group design, the study will compare the efficacy and safety of the Sufentanil NanoTab PCA System to the standard of care, IV PCA with morphine, in the treatment of acute post-operative pain immediately after major abdominal or orthopedic surgery. The primary objective of the study is to demonstrate non-inferiority of ARX-01 to IV PCA with morphine as determined by patient global satisfaction with the method of pain relief. Approximately 400 adult patients, randomized 1:1 to treatment with ARX-01 or IV PCA with morphine, will be treated for post-operative pain for a minimum of 48 hours after randomization. The study will be conducted at approximately 32 academic and community hospitals in the United States with top-line data expected in second half of 2012.
In March 2012, AcelRx initiated its first Phase 3 clinical study for ARX-01, a randomized, double-blind, placebo-controlled efficacy and safety study comparing ARX-01 to placebo for post-operative pain control following major open abdominal surgery. Data from this study is expected in second half of 2012. A third Phase 3 clinical study for ARX-01, expected to start in the third quarter of 2012, will be a randomized, double-blind, placebo-controlled efficacy and safety study comparing ARX-01 to placebo in treating post-operative pain following major joint replacement surgery.
"We are extremely pleased to have our second ARX-01 Phase 3 clinical trial underway. This study is expected to meet several objectives. Firstly, in addition to the two placebo-controlled studies, data from this active-comparator study will complete our ARX-01 safety database enabling review for marketing approval by regulatory agencies in the US and Europe. Secondly, positive results from this study demonstrating that pre-programmed, non-invasive delivery of Sufentanil NanoTabs provide non-inferior pain relief compared to IV PCA with morphine could support commercial adoption. Finally, secondary endpoint data from this study including comparison of average dosing intervals, sedation scores, system-related events and ease of care questionnaires, could support the pharmacoeconomic advantage of ARX-01, which we believe will help support adoption of the product in the US, and enable pricing of the product in Europe," said Richard King, AcelRx's Chief Executive Officer. Mr. King added, "This year is an exciting time for AcelRx, with the delivery of top-line data from all three ARX-01 Phase 3 clinical trials expected by late 2012 or early 2013."
About Post-Operative PainAcute pain management in the hospital, in particular post-operative analgesia, remains a challenge for healthcare providers with up to 75% of patients reporting inadequate pain relief after surgery. Inadequate treatment of post-surgical pain can lead to decreased mobility, which increases the risks for medical complications, including deep vein thrombosis and partial lung collapse, potentially resulting in extended hospital stays. Over 23 million procedures per year result in moderate to severe post-operative pain in the major pharmaceutical markets (US, 5 main EU countries and Japan), resulting in $5.1 billion of acute pain treatment product sales in 2008. Current standard of care for managing post-operative pain is IV PCA, typically utilizing morphine or hydromorphone. However, there are many deficiencies associated with the current use of IV PCA that can negatively impact patient safety, well-being and recovery. These include drug-related side effects associated with morphine or hydromorphone, complications associated with IV delivery, and medication delivery errors typically associated with misprogramming of the complex IV PCA pumps. About ARX-01, the Sufentanil NanoTab PCA System ARX-01 is a pre-programmed, non-invasive, handheld system that allows post-operative patients to self-dose with sublingual Sufentanil NanoTabs to manage their post-operative pain. The ARX-01 System is designed to address the limitations of IV PCA by offering:
- A high therapeutic index opioid : Because ARX-01 uses the high therapeutic index opioid sufentanil, it offers post-operative pain patients the potential for effective patient-controlled analgesia with a low incidence of drug-related side effects. Published data on IV PCA side-effect profiles suggests that somnolence (~50% of patients) and oxygen desaturation (~10% of patients) is unacceptably high. In our Phase 2 clinical studies, patients dosing up to 12 hours with Sufentanil NanoTabs (15 mcg) exhibited a low incidence of somnolence (3%) and oxygen desaturation (1%).
- A non-invasive route of delivery : The sublingual route of delivery used in ARX-01 provides rapid onset of analgesia, therefore eliminating the risk of IV-related analgesic gaps and IV complications, such as catheter-related infections. In addition, because patients are not tethered to IV tubing and a pump for pain relief, ARX-01 allows for ease of patient mobility.
- A simple, pre-programmed PCA solution : ARX-01 is a pre-programmed PCA System designed to eliminate the risk of pump programming errors, which are a potential source of patient harm.