PharmAthene, Inc.'s Anthrax Vaccine Placed on Hold by FDA; Shares Slide

ANNAPOLIS, Md., Aug. 10, 2012 /PRNewswire/ -- PharmAthene, Inc. (NYSE Amex: PIP), a biodefense company developing medical countermeasures against biological and chemical threats, announced today it has received notification from the U.S. Food and Drug Administration (FDA) that its SparVax rPA anthrax vaccine program has been placed on clinical hold. The Agency indicated that the Company will receive a letter providing details of the basis for the clinical hold within 30 days. During this period, PharmAthene will continue to provide the agency with analytical data from its recently produced GMP lot of material. The clinical study, which was expected to begin by the end of this year, has not enrolled any subjects to date and accordingly, there have been no adverse events reported.

About PharmAthene, Inc.

PharmAthene was formed to meet the critical needs of the United States and its allies by developing and commercializing medical countermeasures against biological and chemical weapons. PharmAthene's lead product development programs include:

  • SparVax - a second generation recombinant protective antigen (rPA) anthrax vaccine
  • Recombinant BChE- a novel bioscavenger for the prevention and treatment of morbidity and mortality associated with exposure to chemical nerve agents
  • Valortim® - a fully human monoclonal antibody for the prevention and treatment of anthrax infection

In addition, pursuant to a final judgment issued May 31, 2012 from the Delaware Court of Chancery, PharmAthene is entitled to 50% of the net profits over 10 years from all sales of SIGA Technologies' ST-246®, a novel smallpox antiviral agent being developed by SIGA for the treatment and prevention of morbidity and mortality associated with exposure to the causative agent of smallpox, and related products, once SIGA receives the first $40 million in net profits from sales of ST-246®. For more information about PharmAthene, please visit www.PharmAthene.com.

Statement on Cautionary Factors

Except for the historical information presented herein, matters discussed may constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to certain risks and uncertainties that could cause actual results to differ materially from any future results, performance or achievements expressed or implied by such statements. Statements that are not historical facts, including statements preceded by, followed by, or that include the words "potential"; "believe"; "anticipate"; "intend"; "plan"; "expect"; "estimate"; "could"; "may"; "should"; or similar statements are forward-looking statements. PharmAthene disclaims, however, any intent or obligation to update these forward-looking statements. Risks and uncertainties include risk associated with the reliability of the results of the studies relating to human safety and possible adverse effects resulting from the administration of the Company's product candidates, unexpected funding delays and/or reductions or elimination of U.S. government funding for one or more of the Company's development programs, the award of government contracts to our competitors, unforeseen safety issues, unexpected determinations that these product candidates prove not to be effective and/or capable of being marketed as products, as well as risks detailed from time to time in PharmAthene's Form 10-K under the caption "Risk Factors" and in its other reports filed with the U.S. Securities and Exchange Commission (the "SEC"). In particular, significant additional research work, non-clinical animal studies, human clinical trials, and manufacturing development work remain to be done with respect to SparVax. At this point there can be no assurance that this product candidate will be shown to be safe and effective and approved by regulatory authorities for use in humans. Copies of PharmAthene's public disclosure filings are available from its investor relations department and our website under the investor relations tab at http://www.pharmathene.com.

SOURCE PharmAthene, Inc.

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