Lexicon Pharmaceuticals, Inc. Provides Clinical Pipeline Update and Reports 2009 Fourth Quarter and Full Year Financial Results Conference Call and Webcast at 11:00 a.m. Eastern Time

THE WOODLANDS, Texas, Feb. 23 /PRNewswire-FirstCall/ -- Lexicon Pharmaceuticals, Inc. , a biopharmaceutical company focused on discovering and developing breakthrough treatments for human disease, today updated its drug development progress and reported financial results for the three months and year ended December 31, 2009.

“We have now established proof-of-concept for two of our four clinical programs, with positive results in Phase 2 clinical trials for both LX1031 in IBS and LX4211 in type 2 diabetes,” said Dr. Arthur T. Sands, president and chief executive officer of Lexicon. “We look forward to reporting Phase 2 clinical results from our next two programs, LX2931 for rheumatoid arthritis and LX1032 for carcinoid syndrome.”

Key Developments of 2009

LX1031 and LX1032 are being developed in a product development collaboration with Symphony Capital Partners, L.P. and its co-investors.

Financial Results

Revenues: Lexicon’s revenues for the three months ended December 31, 2009 decreased 78 percent to $1.4 million from $6.4 million for the corresponding period in 2008. The decrease was primarily attributable to reduced revenues under Lexicon’s alliances with N.V. Organon, Bristol-Myers Squibb and Genentech, Inc., partially offset by increases in revenue under the company’s collaboration with Taconic Farms, Inc. For the year ended December 31, 2009, revenues decreased 67 percent to $10.7 million from $32.3 million for the corresponding period in 2008.

Research and Development Expenses: Research and development expenses for the three months ended December 31, 2009 decreased 16 percent to $18.8 million from $22.4 million for the corresponding period in 2008. The decrease was primarily attributable to lower external preclinical research and development expenses as well as lower salary and benefit costs, partially offset by higher external clinical research and development expenses. For the year ended December 31, 2009, research and development expenses decreased 24 percent to $81.2 million from $107.2 million for the corresponding period in 2008.

General and Administrative Expenses: General and administrative expenses for the three months ended December 31, 2009 decreased nine percent to $4.4 million from $4.9 million for the corresponding period in 2008. The decrease was primarily attributable to lower consulting and stock-based compensation expenses. For the year ended December 31, 2009, general and administrative expenses decreased 10 percent to $19.4 million from $21.6 million for the corresponding period in 2008.

Net Loss Attributable to Lexicon Pharmaceuticals, Inc.: Net loss for the three months ended December 31, 2009 was $22.0 million, or $0.13 per share, compared to a net loss of $15.4 million, or $0.11 per share, in the corresponding period in 2008. Net loss for the year ended December 31, 2009 was $82.8 million, or $0.57 per share, compared to a net loss of $76.9 million, or $0.56 per share, for the corresponding period in 2008. For the three months and year ended December 31, 2009, net loss included non-cash, stock-based compensation expense of $1.2 million and $5.3 million, respectively. For the three months and year ended December 31, 2008, net loss included non-cash, stock-based compensation expense of $1.7 million and $6.5 million, respectively.

Cash and Investments: As of December 31, 2009, Lexicon had $125.1 million in cash and investments net of its obligations under the credit line secured by its auction rate securities, as compared to $87.3 million as of September 30, 2009 and $158.8 million as of December 31, 2008.

Lexicon Conference Call:

Lexicon management will hold a conference call to discuss its clinical development progress and financial results for 2009 and financial guidance for 2010 at 11:00 a.m. Eastern Time on February 23, 2010. The dial-in number for the conference call is 888-220-1244 (within the US/Canada) or 706-679-5615 (international). The conference ID for all callers is 57354686. Investors can access a live webcast of the call at www.lexpharma.com. An archived version of the webcast will be available on the website through March 2, 2010.

About Lexicon

Lexicon is a biopharmaceutical company focused on discovering and developing breakthrough treatments for human disease. Lexicon currently has five drug candidates in development for autoimmune disease, carcinoid syndrome, diabetes, glaucoma and irritable bowel syndrome, all of which were discovered by Lexicon’s research team. Lexicon has used its proprietary gene knockout technology to identify more than 100 promising drug targets. Lexicon has focused drug discovery efforts on these biologically-validated targets to create its extensive pipeline of clinical and preclinical programs. For additional information about Lexicon and its programs, please visit www.lexpharma.com.

Safe Harbor Statement

This press release contains “forward-looking statements,” including statements relating to Lexicon’s clinical development of LX1031, LX1032, LX2931, and LX4211 and the potential therapeutic and commercial potential of LX1031, LX1032, LX2931, and LX4211. This press release also contains forward-looking statements relating to Lexicon’s growth and future operating results, discovery and development of products, strategic alliances and intellectual property, as well as other matters that are not historical facts or information. All forward-looking statements are based on management’s current assumptions and expectations and involve risks, uncertainties and other important factors, specifically including those relating to Lexicon’s ability to successfully conduct clinical development of LX1031, LX1032, LX2931, and LX4211 and preclinical and clinical development of its other potential drug candidates, advance additional candidates into preclinical and clinical development, obtain necessary regulatory approvals, achieve its operational objectives, obtain patent protection for its discoveries and establish strategic alliances, as well as additional factors relating to manufacturing, intellectual property rights, and the therapeutic or commercial value of its drug candidates, that may cause Lexicon’s actual results to be materially different from any future results expressed or implied by such forward-looking statements. Information identifying such important factors is contained under “Factors Affecting Forward-Looking Statements” and “Risk Factors” in Lexicon’s annual report on Form 10-K for the year ended December 31, 2008, as filed with the Securities and Exchange Commission. Lexicon undertakes no obligation to update or revise any such forward-looking statements, whether as a result of new information, future events or otherwise.

CONTACT: D. Wade Walke, Director, Corporate Communications of Lexicon
Pharmaceuticals, Inc., +1-281-863-3046, wwalke@lexpharma.com

Web site: http://www.lexpharma.com/

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