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Tonix Pharmaceuticals Announces Completion of Clinical Trial for TNX-102

Published: Tuesday, July 31, 2012
Last Updated: Tuesday, July 31, 2012
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Results support development as a bedtime therapy for fibromyalgia.

Tonix Pharmaceuticals Holding Corp. announces that the clinical portion of a human study of a solution version of TNX-102 2.4 mg sublingual tablets ("TNX-102 SL") has completed. TNX-102 is TONIX's very low dose form of cyclobenzaprine, which the Company is developing as a first-in-class medication for the management of FM.

This comparative pharmacokinetic ("PK") and bioavailability study was conducted in Canada by a leading global clinical research organization. The trial evaluated a solution formulation of the Company's TNX-102 SL tablet containing 2.4 mg of cyclobenzaprine, a control sublingual solution that was designed to simulate crushed immediate-release cyclobenzaprine tablets (2.4 mg), oral ingestion of an immediate-release cyclobenzaprine tablet (5 mg), and intravenous cyclobenzaprine (2.4 mg). The study enrolled 23 healthy adult volunteers and periodically measured circulating blood levels of cyclobenzaprine over six days after receiving study medication.

Seth Lederman, M.D., Chairman and President of TONIX said, "We designed TNX-102 SL to work overnight following bedtime administration, with the goal of improving the pain and other symptoms of FM by improving sleep quality. We view these results as highly encouraging. This was a stringent test of sublingual absorption of cyclobenzaprine, as patients receiving sublingual formulations were instructed to spit and rinse 90 seconds following administration. TNX-102 SL was well-tolerated, and no serious adverse events were reported. The PK results demonstrated that the solution formulation of TNX-102 SL delivered cyclobenzaprine to the systemic circulation more efficiently than the sublingual solution of a simulated crushed tablet and faster than the ingested tablet. We believe the kinetics of plasma cyclobenzaprine demonstrated by TNX-102 SL will translate to more rapid effects compared with current cyclobenzaprine products. We believe these improvements favor its advancement in the FM indication. The data also indicate that, in contrast to our proprietary formulation, sublingual absorption cannot be achieved by crushing currently-available cyclobenzaprine products. We are on track to commence a pivotal clinical trial of TNX-102 SL tablets for FM in the first quarter of 2013."

FM is a common and complex central nervous system condition characterized by chronic diffuse musculoskeletal pain, increased pain sensitivity at multiple tender points, fatigue, abnormal pain processing, and disturbed sleep, and often features psychological stress. In a Phase 2a trial, TONIX demonstrated that bedtime administration of very low dose cyclobenzaprine improves core FM symptoms including pain, tenderness, fatigue, and depression, and also demonstrated that improvements in key symptoms correlate with increased nights of restorative sleep. These results were published in the December 2011 issue of the Journal of Rheumatology. Previous studies of the mechanism by which cyclobenzaprine works have discovered that it acts selectively on serotonin receptor type 2a (5HT2a) and alpha-2 adrenergic receptors. Serotonin is thought to play a major role in the central inhibition of pain.

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