Synthetic Biologics’ SYN-004 for the Prevention of C. difficile Infections Named a “Top Project to Watch” by Elsevier Business Intelligence

— Company to Present at the 2013 Therapeutic Area Partnerships Conference —

ROCKVILLE, Md., Nov. 14, 2013 /PRNewswire/ — Synthetic Biologics, Inc. (NYSE MKT: SYN), a developer of biologics focused on the prevention and treatment of serious infectious diseases, today announced that SYN-004, Synthetic Biologics’ product candidate for the prevention of C. difficile infections, was selected as a 2013 Top Project to Watch in the infectious disease area. This selection was made through Elsevier Business Intelligence’s panel of independent experts who screen hundreds of compounds and weigh their potential as future products. The Company also announced that Jeffrey Riley, CEO, will present at the 2013 Therapeutic Area Partnerships Conference on Tuesday, November 19, 2013 at 4:00pm (EST) at the Hyatt Regency in Boston.

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Mr. Riley, as well as Synthetic Biologics’ CFO, C. Evan Ballantyne, will be available to participate in one-on-one meetings with conference attendees on Tuesday and Wednesday, November 19 and 20, 2013.

About Elsevier Business Intelligence and the Therapeutic Area Partnerships Conference

Elsevier Business Intelligence provides business intelligence on regulatory, business and reimbursement issues that are vital to the healthcare industry. Through a range of products including publications, conferences, databases and reports, Elsevier Business Intelligence places biopharma and medical device professionals, and those who focus on these industries, at the forefront of knowledge, by providing a combination of news and information together with penetrating insight and analysis.

Organized by Elsevier Business Intelligence, the 2013 Therapeutic Area Partnerships (TAP) conference is designed to bring together biopharmaceutical industry decision makers to assess the most promising drug programs available for partnering in the following therapeutic areas: oncology, cardiovascular/metabolic diseases, neuroscience, infectious diseases, anti-inflammatory/autoimmune diseases and advanced therapies. For more information, please visit the conference website at http://www.elsevierbi.com/mkt/Conf/TAP2013/PresentingCos.

About Synthetic Biologics, Inc.

Synthetic Biologics (NYSE MKT: SYN) is a biotechnology company focused on the development of biologics for the prevention and treatment of serious infectious diseases. The Company is developing an oral enzyme for the prevention of C. difficile infections, and a series of monoclonal antibody therapies for the treatment of Pertussis and Acinetobacter infections. In addition, the Company is developing a drug candidate for the treatment of relapsing-remitting multiple sclerosis and cognitive dysfunction in multiple sclerosis. For more information, please visit Synthetic Biologics’ website at www.therivabio.com.

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SOURCE Synthetic Biologics, Inc.