La Jolla Pharmaceutical Company Announces Start of Common Stock Quotation on OTCBB

SAN DIEGO, CA--(Marketwired - April 03, 2013) - La Jolla Pharmaceutical Company (OTCBB: LJPC) (“La Jolla”), a leader in the development of therapeutics targeting galectin proteins, announced today that its common stock started quotation on the OTC Bulletin Board (“OTCBB”). The OTCBB is a regulated quotation service that displays real-time quotes, last-sale prices, and volume information in over-the-counter (“OTC”) equity securities operated by FINRA. La Jolla has been and continues to be quoted on the OTCQB, which is operated by OTC Markets, Inc. OTCQB is a market tier of OTC Markets for U.S. companies registered with and reporting to the Securities and Exchange Commission (“SEC”).

“Having our stock quoted on the OTCBB is an important step for La Jolla and our investors,” said George Tidmarsh, M.D. Ph.D., Chief Executive Officer of La Jolla. “This key milestone facilitates the growth and development of our company and GCS-100.”

About La Jolla Pharmaceutical Company

La Jolla Pharmaceutical Company is a biopharmaceutical company dedicated to the development of medical treatments that significantly improve outcomes in patients with life-threatening diseases. GCS-100, the Company’s lead product candidate, is a first-in-class inhibitor of galectin-3, a novel molecular target implicated in chronic organ failure and cancer. For more information on the Company please visit http://www.ljpc.com.

Forward Looking Statement Safe Harbor

This document contains forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements relate to future events or our future results of operations. These statements are only predictions and involve known and unknown risks, uncertainties and other factors, which may cause actual results to be materially different from these forward-looking statements. The Company cautions readers not to place undue reliance on any such forward-looking statements, which speak only as of the date they were made. Certain of these risks, uncertainties, and other factors are described in greater detail in the Company’s filings from time to time with the U.S. Securities and Exchange Commission (SEC), all of which are available free of charge on the SEC’s web site http://www.sec.gov. These risks include, but are not limited to, risks relating to the development of GCS-100, the success and timing of future preclinical and clinical studies of this compound, and potential indications for which GCS-100 may be developed. Subsequent written and oral forward-looking statements attributable to the Company or to persons acting on its behalf are expressly qualified in their entirety by the cautionary statements set forth in the Company’s reports filed with the SEC. The Company expressly disclaims any intent to update any forward-looking statements.