Synthetic Biologics to Report Second Quarter Results on August 10, 2015

— Conference Call Scheduled for Monday, August 10, 2015 at 8:30 a.m. EDT —

ROCKVILLE, Md., July 29, 2015 /PRNewswire/ — Synthetic Biologics, Inc. (NYSE MKT: SYN), a clinical-stage company focused on developing therapeutics to protect the microbiome while targeting pathogen-specific diseases, intends to release its financial results for the three and six months ended June 30, 2015 on Monday, August 10, 2015, and to host a conference call the same day at 8:30 a.m. EDT. The dial-in information for the call is as follows:

U.S. (toll free): 1-888-347-5280
International: +1 412-902-4280

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Participants are asked to dial in 15 minutes before the start of the call to register. The call will also be webcast over the Internet at https://www.webcaster4.com/Webcast/Page/1096/9809. An archive of the call will be available for approximately 90 days at the same URL, https://www.webcaster4.com/Webcast/Page/1096/9809, beginning approximately one hour after the call’s conclusion.

About Synthetic Biologics, Inc.

Synthetic Biologics, Inc. (NYSE MKT: SYN) is a microbiome-focused, clinical-stage company developing therapeutics to protect the microbiome while targeting pathogen-specific diseases. The Company’s lead candidates in Phase 2 development include SYN-004 which is designed to protect the gut microbiome from the effects of certain commonly used intravenous (IV) antibiotics for the prevention of C. difficile infection and antibiotic-associated diarrhea (AAD), and SYN-010 which is intended to reduce the impact of methane producing organisms in the gut microbiome to treat the underlying cause of irritable bowel syndrome with constipation (IBS-C). In addition, the Company is developing a Phase 2 oral estriol drug for the treatment of relapsing-remitting multiple sclerosis (MS) and cognitive dysfunction in MS, and a monoclonal antibody combination for the treatment of Pertussis. For more information, please visit Synthetic Biologics’ website at www.syntheticbiologics.com.

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SOURCE Synthetic Biologics, Inc.