About Optimer PharmaceuticalsOptimer Pharmaceuticals, Inc. is a global biopharmaceutical company focused on developing and commercializing innovative hospital specialty products that have a positive impact on society. Optimer developed DIFICID® (fidaxomicin) tablets, an FDA-approved macrolide antibacterial drug for the treatment of Clostridium difficile-associated diarrhea (CDAD) in adults 18 years of age and older and is commercializing DIFICID in the US and Canada. Optimer also received marketing authorization for fidaxomicin tablets in the European Union where its partner, Astellas Pharma Europe, is commercializing fidaxomicin under the trade name DIFICLIR™. The Company is exploring marketing authorization in other parts of the world where C. difficile has emerged as a serious health problem, including Asia. Additional information can be found at http://www.optimerpharma.com. Forward-Looking Statements Statements included in this press release that are not a description of historical facts are forward-looking statements, including without limitation statements related to Optimer's plans to launch a hospital contracting initiative to lower the acquisition cost of DIFICID to acute care hospitals, any anticipated increase in hospital utilization of DIFICID as a result of that initiative, the potential increase in retail utilization of DIFICID if hospital utilization increases, Optimer's plans to implement other initiatives to increase patient access to DIFICID and Optimer's belief that greater patient access will result in greater DIFICID utilization, Optimer's expectation that utilization of its Rx Assist program will continue to increase, and expectations of future publication of research and analyses. Words such as "believes", "would", "anticipates", "plans", "expects", "may", "intend", "will", and similar expressions are intended to identify forward-looking statements. The inclusion of forward-looking statements should not be regarded as a representation by Optimer that any of its plans will be achieved. These forward-looking statements are based on management's expectations on the date of this release and Optimer undertakes no obligation to update or revise these statements, except as may be required by law. Actual results may differ materially from those set forth in this release due to the risks and uncertainties inherent in Optimer's business including, without limitation, risks relating to: Optimer's ability to continue driving adoption and use of DIFICID, DIFICID's ability to compete with cheaper generic competition, whether healthcare professionals will prescribe DIFICID, the extent to which DIFICID will be accepted on additional hospital formularies and the timing of hospital formulary decisions, whether Optimer's hospital contracting strategy will result in additional DIFICID prescriptions in the hospital or retail markets, whether Rx Assist is utilized and whether it will facilitate access to DIFICID and other risks detailed in Optimer's filings with the Securities and Exchange Commission.