JZP-6

Treatment for Fibromyalgia

NDA Submitted for JZP-6 (sodium oxybate)

Jazz Pharmaceuticals Submits New Drug Application for JZP-6 (sodium oxybate) for the Treatment of Fibromyalgia

PALO ALTO, Calif., Dec. 15 /PRNewswire-FirstCall/ -- Jazz Pharmaceuticals, Inc. announced it has submitted a New Drug Application (NDA) to the U.S. Food and Drug Administration for JZP-6 (sodium oxybate oral solution) for the treatment of fibromyalgia.

The submission is based on a comprehensive clinical development program for JZP-6, including results from two Phase III clinical trials. In both trials, sodium oxybate significantly decreased pain and fatigue as well as improved daily function, patient global impression of change, and sleep quality. Sodium oxybate has not been evaluated by regulators for the treatment of fibromyalgia and is not approved for this use.

Fibromyalgia is a complex musculoskeletal disorder clinically characterized by widespread pain usually accompanied by fatigue, insomnia, and dyscognition. According to the American College of Rheumatology (ACR), an estimated 6 million Americans suffer from fibromyalgia.

About Sodium Oxybate

Sodium oxybate is the sodium salt form of gamma-hydroxybutyrate, an endogenous neurotransmitter and metabolite of GABA. While the precise mechanism of action is unknown, the effects may be mediated in part through interaction with GABA(B) and GHB receptors. Sodium oxybate is the active ingredient in Xyrem, approved by the FDA and marketed by Jazz Pharmaceuticals in the U.S. for the treatment of excessive daytime sleepiness and cataplexy (the sudden loss of muscle tone) in adult patients with narcolepsy. The American Academy of Sleep Medicine recommends sodium oxybate as a standard of care for the FDA-approved indications. UCB markets Xyrem (sodium oxybate oral solution) in Europe, where it is approved by the EMEA for the treatment of narcolepsy with cataplexy in adult patients under a license from Jazz Pharmaceuticals. Most commonly reported adverse drug reactions in narcolepsy patients are dizziness, nausea and headaches. Sodium oxybate has the potential to induce respiratory depression and neuropsychiatric events. Sodium oxybate has not been evaluated by regulators for the treatment of fibromyalgia and is not approved for this use.

About Fibromyalgia

Fibromyalgia is a chronic condition characterized by widespread pain. Fibromyalgia is believed to be a central nervous system condition, resulting from neurological changes in how the brain perceives and responds to pain. In addition to pain, the main symptoms are fatigue, disturbed sleep and morning stiffness. The exact causes of fibromyalgia are unknown. It may be triggered by physical trauma, emotional stress, chronic pain or infection. Genetics, neurochemicals that affect pain modulation, neurohormones and sleep physiology abnormalities are thought to play a role. Research also has suggested a relationship between sleep and pain. Fibromyalgia patients experience a high prevalence of sleep problems, including a reduction in non-restorative or deep sleep.

About Jazz Pharmaceuticals, Inc.

Jazz Pharmaceuticals is a specialty pharmaceutical company that identifies, develops and commercializes innovative treatments for important, underserved markets in neurology and psychiatry. For further information see www.JazzPharmaceuticals.com.

Source: Jazz Pharmaceuticals, Inc.

CONTACT: Willie Quinn, Executive Director, Corporate Development of Jazz Pharmaceuticals, Inc., investorinfo@jazzpharmaceuticals.com; or Karen L. Bergman, +1-650-575-1509, or Michelle Corral, +1-415-794-8662, both of BCC Partners for Jazz Pharmaceuticals, Inc.

Web Site: http://www.jazzpharmaceuticals.com/

Posted: December 2009

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