Synthetic Biologics to Report Year End 2013 Financial Results

– Company Focused on Novel Anti-Infective Pipeline for the Prevention and Treatment of Serious Infections and Other Diseases –

– Conference Call Scheduled for Monday, March 31, 2014, at 10:00 am EDT –

ROCKVILLE, Md., March 25, 2014 /PRNewswire/ — Synthetic Biologics, Inc. (NYSE MKT: SYN), a developer of novel anti-infective biologic and drug candidates targeting specific pathogens that cause serious infections and other diseases, announced today that it intends to release its financial results for the year ended December 31, 2013 on Monday, March 31, 2014.

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The Company will hold an investor conference call on Monday, March 31, 2014, at 10:00 am EDT. During the call, Jeffrey Riley, Synthetic Biologics’ Chief Executive Officer, will provide a brief update of the Company’s multiple sclerosis program and its anti-infective drug pipeline for infections and other diseases, including the prevention of C. difficile infections, reducing the impact of methane producing organisms on constipation-predominant irritable bowel syndrome (C-IBS) and the treatment of Pertussis. C. Evan Ballantyne, Synthetic Biologics’ Chief Financial Officer, will review the Company’s financial results for the year ended December 31, 2013.

Interested parties should call 1-877-870-4263 (U.S. toll free), 1-855-669-9657 (Canada toll free), or +1 412-317-0790 (International), fifteen minutes before the start of the call to register. Registered callers on the toll free line may ask to be placed in the queue for the Question & Answer Session. The call will also be webcast over the Internet at http://www.videonewswire.com/event.asp?id=98657. If you are unable to participate during the live conference call, the webcast will be available for replay at the same URL, http://www.videonewswire.com/event.asp?id=98657 for 30 days after the call.

About Synthetic Biologics, Inc.

Synthetic Biologics, Inc. (NYSE MKT: SYN) is a biotechnology company focused on the development of novel anti-infective biologic and drug candidates targeting specific pathogens that cause serious infections and other diseases. The Company is developing an oral treatment to reduce the impact of methane producing organisms on constipation-predominant irritable bowel syndrome (C-IBS), an oral biologic to protect the gastrointestinal microflora from the effects of IV antibiotics for the prevention of C. diff infection, a series of monoclonal antibodies for the treatment of Pertussis and Acinetobacter infections, and a biologic targeted at the prevention and treatment of a root cause of a subset of IBS. In addition, the Company is developing an oral estriol drug for the treatment of relapsing-remitting multiple sclerosis (MS) and cognitive dysfunction in MS. For more information, please visit Synthetic Biologics’ website at www.therivabio.com.

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SOURCE Synthetic Biologics, Inc.