About ZogenixZogenix, Inc. (Nasdaq:ZGNX), with offices in San Diego and Emeryville, California, is a pharmaceutical company commercializing and developing products for the treatment of central nervous system disorders and pain. Zogenix's first commercial product, SUMAVEL® DosePro® (sumatriptan injection) Needle-free Delivery System, was launched in January 2010 for the acute treatment of migraine and cluster headache. Zogenix's lead investigational product candidate, Zohydro™ ER (hydrocodone bitartrate), is an oral, extended-release formulation of various strengths of hydrocodone, without acetaminophen, intended for administration every 12 hours for around the clock management of moderate to severe chronic pain. In May 2012, Zogenix submitted to the FDA a New Drug Application for Zohydro ER. Zogenix's second investigational product candidate, Relday™, is a proprietary, long-acting injectable formulation of risperidone for the treatment of schizophrenia; an investigational new drug application was submitted to the FDA in May 2012. For additional information, please visit www.zogenix.com. Forward Looking Statements Zogenix cautions you that statements included in this press release and the conference call that are not a description of historical facts are forward-looking statements. Words such as "believes," "anticipates," "plans," "expects," "indicates," "will," "intends," "potential," "suggests," "assuming," "designed" and similar expressions are intended to identify forward-looking statements. These statements are based on the company's current beliefs and expectations. These forward-looking statements include statements regarding: the potential to accelerate development and partnering opportunities for Relday; the expected sales growth and adoption of SUMAVEL DosePro, including through the efforts of Mallinckrodt; the delay in the target action date for the FDA to complete its review of the Zohydro ER NDA; and the expected launch timing of Zohydro ER, if approved. The inclusion of forward-looking statements should not be regarded as a representation by Zogenix that any of its plans will be achieved. Actual results may differ from those set forth in this press release due to the risk and uncertainties inherent in Zogenix's business, including, without limitation: the market potential for migraine treatments, and Zogenix's ability to compete within that market; Zogenix's ability to successfully execute its sales and marketing strategy for the commercialization of SUMAVEL DosePro; Zogenix's reliance on Mallinckrodt to co-promote SUMAVEL DosePro; inadequate therapeutic efficacy or unexpected adverse side effects relating to SUMAVEL DosePro that could prevent its ongoing commercialization, or that could result in recalls or product liability claims; the potential for Zohydro to receive regulatory approval on a timely basis or at all, including as a result of the delay in the PDUFA target action date for the Zohydro ER NDA; the potential for adverse safety findings relating to Zohydro ER or negative publicity concerning opioids in general to delay or prevent regulatory approval or commercialization; the potential for delays associated with any additional data required by the FDA to be submitted by Zogenix in support of the NDA; the ability of Zogenix and its licensors to obtain, maintain and successfully enforce adequate patent and other intellectual property protection of its products and product candidates and the ability to operate its business without infringing the intellectual property rights of others; difficulties in identifying, negotiating and carrying out strategic transactions relating to Zohydro ER and Relday; the inherent risks of clinical development of Relday, including potential delays in enrollment and completion of clinical trials, and Zogenix's dependence on its collaboration with DURECT Corporation to develop Relday; and other risks described in Zogenix's filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and Zogenix undertakes no obligation to revise or update this press release to reflect events or circumstances after the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement. This caution is made under the safe harbor provisions of Section 21E of the Private Securities Litigation Reform Act of 1995.