Synthetic Biologics to Host Phase II Trimesta™ for Multiple Sclerosis Conference Call

— Conference Call Scheduled for Friday, September 12, 2014, at 9:15 a.m. EDT —

ROCKVILLE, Md., Sept. 11, 2014 /PRNewswire/ — Synthetic Biologics, Inc. (NYSE MKT: SYN), a biotechnology company developing novel anti-infective biologic and drug candidates targeting specific pathogens that cause serious infections and diseases, announced today that it will host a an investor conference call on Friday, September 12, 2014, at 9:15 a.m. EDT. The conference call will highlight TrimestaTM, the Company’s oral product candidate for the treatment of relapsing-remitting multiple sclerosis (MS), immediately following the oral presentation at 8:39 a.m. EDT by lead academic investigator, Rhonda Voskuhl, M.D., at the 2014 Joint Americas and European Committees for Treatment and Research in Multiple Sclerosis Meeting (ACTRIMS-ECTRIMS) in Boston.

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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=100450. 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=100450, for 60 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 diseases. The Company is developing an oral biologic to protect the gastrointestinal microflora from the effects of IV antibiotics for the prevention of Clostridium difficile (C. difficile) infection, an oral treatment to reduce the impact of methane producing organisms on constipation-predominant irritable bowel syndrome (C-IBS), 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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