New Drug Application Submitted to U.S. Food and Drug Administration

Marketing Authorization Application Submitted to European Medicines Agency

THE WOODLANDS, TX, USA I March 26, 2018 I Lexicon Pharmaceuticals, Inc. (Nasdaq:LXRX), today announced that its collaborator, Sanofi, has submitted a New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) and a Marketing Authorization Application (MAA) to the European Medicines Agency (EMA) for sotagliflozin, an investigational dual SGLT1 and SGLT2 inhibitor, for use in combination with insulin therapy to improve glycemic control in adults with type 1 diabetes mellitus.

“The NDA and MAA submissions for sotagliflozin represent important milestones for Lexicon and for people in the United States and Europe who are living with the challenges of type 1 diabetes,” said Pablo Lapuerta, M.D., executive vice president and chief medical officer. “These filings highlight our strong investment in internally discovered therapies and are a culmination of the largest Phase 3 program for an oral anti-diabetic agent ever conducted in type 1 diabetes, in the broadest range of patients, resulting in the most comprehensive efficacy and safety database. I am extremely proud of our team members who have worked tirelessly to achieve this step towards bringing this important potential therapy to patients with type 1 diabetes.”

“With approximately three-quarters of adult patients in the U.S. with type 1 diabetes not reaching their A1C goals, sotagliflozin would represent an important advance in managing these patients,” said Anne Peters, M.D., Professor of Medicine at the Keck School of Medicine of USC, Director of the USC Clinical Diabetes Programs and Chairman of the Sotagliflozin Type 1 Diabetes Steering Committee. “It potentially will be the first oral agent in the U.S. to be used in combination with insulin to improve glycemic control and patient outcomes.”

About Sotagliflozin

Discovered using Lexicon’s unique approach to gene science, sotagliflozin is an investigational oral dual inhibitor of two proteins responsible for glucose regulation known as sodium-glucose co-transporter types 1 and 2 (SGLT1 and SGLT2). SGLT1 is responsible for glucose absorption in the gastrointestinal tract, and SGLT2 is responsible for glucose reabsorption by the kidney.

Lexicon entered into a collaboration and license agreement with Sanofi in November 2015 under which Lexicon granted Sanofi an exclusive, worldwide (excluding Japan), royalty-bearing right and license to develop, manufacture and commercialize sotagliflozin. Lexicon is responsible for all clinical development activities relating to type 1 diabetes and has exercised an exclusive option to co-promote and have a significant role, in collaboration with Sanofi, in the commercialization of sotagliflozin for the treatment of type 1 diabetes in the U.S. Sanofi is responsible for all clinical development and commercialization of sotagliflozin for the treatment of type 2 diabetes worldwide (excluding Japan) and is solely responsible for the commercialization of sotagliflozin for the treatment of type 1 diabetes outside the U.S. (excluding Japan).

About Lexicon Pharmaceuticals

Lexicon is a fully integrated biopharmaceutical company that is applying a unique approach to gene science based on Nobel Prize-winning technology to discover and develop precise medicines for patients with serious, chronic conditions. Through its Genome5000™ program, Lexicon scientists have studied the role and function of nearly 5,000 genes over the last 20 years and have identified more than 100 protein targets with significant therapeutic potential in a range of diseases. Through the precise targeting of these proteins, Lexicon is pioneering the discovery and development of innovative medicines to safely and effectively treat disease. In addition to its first commercial product, XERMELO® (telotristat ethyl), Lexicon has a pipeline of promising drug candidates in clinical and pre-clinical development in diabetes and metabolism and neuropathic pain. For additional information please visit www.lexpharma.com.

SOURCE: Lexicon Pharmaceuticals