Jazz Pharmaceuticals : Announces Positive Results from the Phase 2/3 EXPRESS Study of Xyrem in Pediatric Patients with Narcolepsy with Cataplexy

About Xyrem
Xyrem oral solution, CIII, is indicated for the treatment of cataplexy in narcolepsy and for the treatment of excessive daytime sleepiness (EDS) in narcolepsy. Xyrem may only be dispensed to patients enrolled in the Xyrem REMS Program. Xyrem was first approved in the U.S. in 2002, based on clinical trial data in adults. The current USPI for Xyrem indicates that safety and effectiveness in pediatric patients have not been established. Therefore, subject to completion of the full data analysis, Jazz plans to submit a supplemental NDA to FDA in the fourth quarter of 2017, with revised proposed labeling to include these data, consistent with the Agency's pediatric written request.

IMPORTANT SAFETY INFORMATION
Xyrem is a central nervous system (CNS) depressant. In clinical trials at recommended doses obtundation and clinically significant respiratory depression occurred in Xyrem-treated patients. Almost all of the patients who received Xyrem during clinical trials in narcolepsy were receiving central nervous system stimulants.

Xyrem is the sodium salt of gamma hydroxybutyrate (GHB). Abuse of GHB, either alone or in combination with other CNS depressants, is associated with CNS adverse reactions, including seizure, respiratory depression, decreases in the level of consciousness, coma, and death.
Because of the risks of CNS depression, abuse, and misuse, Xyrem is available only through a restricted distribution program called the Xyrem REMS Program, using the central pharmacy that is specially certified. Prescribers and patients must enroll in the program. For further information go towww.XYREMREMS.comor call 1-866-XYREM88® (1-866- 997-3688).

Xyrem is contraindicated in combination with sedative hypnotics or alcohol and in patients with succinic semialdehyde dehydrogenase deficiency.

Caution should be used when considering the concurrent use of Xyrem with other CNS depressants. Healthcare providers should caution patients against hazardous activities requiring complete mental alertness or motor coordination within the first 6 hours of dosing or after first initiating treatment until certain that Xyrem does not affect them adversely. The rapid onset of sedation, coupled with the amnestic features of Xyrem, particularly when combined with alcohol, has proven to be dangerous for the voluntary and involuntary user (e.g. assault victim). Patients should be monitored for emergent or increased depression and suicidality and for impaired motor/cognitive function. Episodes of sleepwalking should be fully evaluated and appropriate interventions considered. The amount of daily sodium intake in each dose of Xyrem should be considered in patients sensitive to salt intake. The most common adverse reactions were nausea, dizziness, vomiting, somnolence, enuresis, and tremor.

Please click here to see the full Prescribing Information for Xyrem, including BOXED Warning.

Reference:

EXPRESS stands for the Effect of Xyrem in Pediatric naRcolEpSy patientS
Dauvilliers Y, Montplaisir J, Molinari N, Carlander B, Ondze B, Besset A, Billiard M. Age at onset of narcolepsy in two large populations of patients in France and Quebec. Neurol 2001; 57:2029-2033.

'Safe Harbor' Statement under the Private Securities Litigation Reform Act of 1995
This press release contains forward-looking statements, including, but not limited to, statements related to the expected presentation of results from the company's Phase 2/3 pediatric narcolepsy study evaluating narcolepsy with cataplexy, the company's plans for submission of a supplemental NDA with the FDA for the use of Xyrem in pediatric patients, the timing of such events and activities, and other statements that are not historical facts. These forward-looking statements are based on the company's current plans, objectives, estimates, expectations and intentions and inherently involve significant risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, risks and uncertainties associated with: pharmaceutical product development and clinical success thereof and the regulatory approval process, including the risk that the company may be unable to obtain approval by the FDA of its supplemental NDA for Xyrem in a timely manner or at all; and other risks and uncertainties affecting the company and its development programs, including those described from time to time under the caption 'Risk Factors' and elsewhere in Jazz Pharmaceuticals plc'sSecurities and Exchange Commission filings and reports (Commission File No. 001-33500), including the company's Annual Report on Form 10-K for the period ended December 31, 2016 and future filings and reports by the company. Other risks and uncertainties of which the company is not currently aware may also affect the company's forward-looking statements and may cause actual results and the timing of events to differ materially from those anticipated. The forward-looking statements herein are made only as of the date hereof or as of the dates indicated in the forward-looking statements, even if they are subsequently made available by the company on its website or otherwise. The company undertakes no obligation to update or supplement any forward-looking statements to reflect actual results, new information, future events, changes in its expectations or other circumstances that exist after the date as of which the forward-looking statements were made.

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SOURCE Jazz Pharmaceuticals plc

Jazz Pharmaceuticals Contacts: Investors: Kathee Littrell, Vice President, Investor Relations, Ireland, +353 1 634 7887, U.S., +1 650 496 2717; Media: Jacqueline Kirby, Vice President, Corporate Affairs & Government Relations, Ireland, +353 1 697 2141, U.S., +1 215 867 4910