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Procysbi

Generic name: cysteamine bitartrate
Treatment for: Nephropathic Cystinosis

Raptor Pharmaceutical Corp. Provides Update on Procysbi NDA Review

NOVATO, Calif., Dec. 21, 2012 (GLOBE NEWSWIRE) -- Raptor Pharmaceutical Corp. ("Raptor" or the "Company"), today announced that the U.S. Food and Drug Administration ("FDA") will require additional time to complete its review of the New Drug Application ("NDA") for RP103 (Procysbi), for the potential treatment of nephropathic cystinosis. In a notice received today from the FDA, the initial Prescription Drug User Fee Act ("PDUFA") goal date has been extended from January 30, 2013 to April 30, 2013. The three month extension is a standard extension period.

The FDA exercised its option to extend the PDUFA goal date to provide more time to complete the review of information submitted within three months of the PDUFA date. The agency has not asked for additional studies.

About Cystinosis and RP103

Cystinosis is a rare, life-threatening metabolic disorder that causes systemic toxic cystine accumulation. Toxic cystine accumulation leads to progressive and irreversible tissue damage and multi-organ failure including renal failure, blindness, CNS damage, respiratory deficiencies, muscle wasting, and premature death. Cystinosis is usually diagnosed in the first years of life and requires lifelong therapy. Left untreated, the disease is fatal by the end of the first decade of life. Daily cystine depletion is the primary treatment strategy for cystinosis. Despite a life-long requirement for cystine-depleting agent use to help preserve multi-organ function, a cumulative inability to maintain adequate cystine control results in the rapid deterioration of kidney function and ensuing need for kidney transplantation.

RP103 is an oral, delayed and extended-release medication containing enteric-coated spheronized micro-beads of cysteamine bitartrate.
Procysbi is the branded name of RP103 for the potential treatment of cystinosis. The NDA and Marketing Authorization Application for
RP103 for the potential treatment of nephropathic cystinosis have been submitted to the FDA and the European Medicines Agency, respectively, and the NDA has been assigned a PDUFA date of April 30, 2013. RP103 is also in clinical development for the potential treatment of Huntington's disease and non-alcoholic steatohepatitis ("NASH"). In cystinosis patients, RP103 may reduce cellular toxicity by continuously removing cystine from the lysosome. RP103, which can also cross the blood-brain barrier, was engineered specifically to allow release of cysteamine bitartrate micro-spheres in the duodenum for optimal absorption while simultaneously enabling administration every 12-hours for the potential treatment of cystinosis.

About Raptor Pharmaceutical Corp.

Raptor Pharmaceutical Corp. ("Raptor") (Nasdaq:RPTP) seeks to research, develop, and provide access to medicines that improve life for patients with severe and rare disorders. Raptor currently has product candidates in clinical development designed to potentially treat nephropathic cystinosis, non-alcoholic steatohepatitis, Huntington's Disease, and aldehyde dehydrogenase deficiency.

Raptor's preclinical programs are based upon bioengineered novel drug candidates and drug-targeting platforms derived from the human receptor-associated protein and related proteins that are designed to target cancer and infectious diseases.

For additional information, please visit www.raptorpharma.com.

The Raptor Pharmaceutical Corp. logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=7180


FORWARD LOOKING STATEMENTS

This document contains forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements relate to future events or our future results of operation or future financial performance, including, but not limited to the following statements: that the FDA will deliver a decision regarding marketing approval of RP103 for the potential treatment of cystinosis on April 30, 2013; and that Raptor will be able to successfully develop
RP103 or any of its other product candidates. These statements are only predictions and involve known and unknown risks, uncertainties and other factors, which may cause the Company's actual results to be materially different from these forward-looking statements. Factors which may significantly change or prevent the Company's forward looking statements from fruition include: that Raptor may be unsuccessful in developing any products or acquiring products; that Raptor's technology may not be validated as it progresses further and its methods may not be accepted by the scientific community; that Raptor is unable to retain or attract key employees whose knowledge is essential to the development of its products; that unforeseen scientific difficulties develop with the Company's process; that Raptor's patents are not sufficient to protect essential aspects of its technology; that competitors may invent better technology; that Raptor's products may not work as well as hoped or worse, that the Company's products may harm recipients; and that Raptor may not be able to raise sufficient funds for development or working capital. As well, Raptor's products may never develop into useful products and even if they do, they may not be approved for sale to the public. Raptor cautions readers not to place undue reliance on any such forward-looking statements, which speak only as of the date they were made. Certain of these risks, uncertainties, and other factors are described in greater detail in the Company's filings from time to time with the Securities and Exchange Commission (the "SEC"), which Raptor strongly urges you to read and consider, including: Raptor's annual report on Form 10-K, filed with the SEC on November 14, 2012, which is available free of charge on the SEC's web site at http://www.sec.gov. Subsequent written and oral forward-looking statements attributable to Raptor or to persons acting on its behalf are expressly qualified in their entirety by the cautionary statements set forth in Raptor's reports filed with the SEC.
Raptor expressly disclaims any intent or obligation to update any forward-looking statements.


CONTACT: Georgia Erbez
Chief Financial Officer
Raptor Pharmaceutical Corp.
(415) 382-1111 x204
gerbez@raptorpharma.com

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