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Exelbine

Treatment for Non-Small Cell Lung Cancer

NDA to be Resubmitted for Exelbine

Adventrx to Resubmit ANX-530 NDA in the Fourth Quarter of 2010

SAN DIEGO, April 27 /PRNewswire-FirstCall/ -- ADVENTRX Pharmaceuticals, Inc. today announced that, based on information received from the U.S. Food and Drug Administration (FDA), the Company plans to resubmit its New Drug Application (NDA) for ANX-530 (vinorelbine injectable emulsion), or Exelbine, in the fourth quarter of 2010.

"We are pleased to have clarified with the FDA certain matters concerning the stability data necessary to file the Exelbine NDA," said Brian M. Culley, Chief Executive Officer of Adventrx. "The studies that will generate the stability data from our intended commercial manufacturing site that the FDA wishes to see are ongoing, and we plan to resubmit the NDA in the fourth quarter of this year."

Adventrx submitted an NDA for ANX-530 to the FDA in December 2009. The Company announced on March 1, 2010 that it had received a refusal-to-file letter from the FDA regarding that submission. In the letter, the FDA indicated that the data included in the December 2009 NDA submission from the intended commercial manufacturing site was insufficient to support a commercially-viable expiration dating period. The FDA identified only this one chemistry, manufacturing and controls (CMC) reason for the refusal to file. No clinical or nonclinical issues were identified.

About Adventrx Pharmaceuticals

Adventrx Pharmaceuticals is a specialty pharmaceutical company whose product candidates are designed to improve the performance of existing cancer treatments by addressing limitations associated principally with their safety and use. More information can be found on the Company's web site at www.adventrx.com.

Forward Looking Statements

Adventrx cautions you that statements included in this press release that are not a description of historical facts are forward-looking statements that involve risks and assumptions that, if they materialize or do not prove to be accurate, could cause Adventrx's results to differ materially from historical results or those expressed or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to: the risk that the FDA does not accept a resubmitted ANX-530 NDA for review, including as a result of identifying clinical or nonclinical reasons for a refusal-to-file or identifying currently unidentified CMC reasons for a refusal-to-file; the risk that future stability testing results are not consistent with prior results or are out-of-specification and do not support comparability between manufacturing sites; Adventrx's dependence on the success of ANX-530, and increased uncertainty as to whether ANX-530 will receive regulatory approval or be commercialized successfully; the risk that the bioequivalence data and other information included in the ANX-530 NDA may not adequately support bioequivalence with Navelbine®; the potential that changes made in transferring the manufacturing process for ANX-530 may result in a lack of comparability between the commercial product and the material used in the bioequivalence trial, and that the FDA may require Adventrx to perform additional nonclinical, bioequivalence or clinical studies; the potential for the FDA to impose other requirements to be completed before or after approval of the ANX-530 NDA; the risk that Adventrx will pursue development activities at levels or on timelines, or will incur unexpected expenses, that shortens the period through which its operating funds will sustain it; the risk that Adventrx will be unable to raise sufficient additional capital to commercialize ANX-530, if an ANX-530 NDA is resubmitted, accepted for filing and ultimately approved; and other risks and uncertainties more fully described in Adventrx's press releases and periodic filings with the Securities and Exchange Commission. Adventrx's public filings with the Securities and Exchange Commission are available at www.sec.gov.

You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date when made. Adventrx does not intend to revise or update any forward-looking statement set forth in this press release to reflect events or circumstances arising after the date on which it was made.

Source: Adventrx Pharmaceuticals, Inc.

CONTACT: Brian Culley, Chief Executive Officer of Adventrx Pharmaceuticals, +1-858-552-0866, or Investors, Don Markley of Lippert/Heilshorn & Associates, Inc., +1-310-691-7100, dmarkley@lhai.com, for Adventrx Pharmaceuticals, Inc.

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

Posted: May 2010

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