Development PlanStudy 301 is the first of two Phase 3 clinical trials of tavaborole in onychomycosis. Anacor received a Special Protocol Assessment from the FDA on all major parameters of the studies, including endpoints. Data from the second Phase 3 clinical trial (known as Study 302) are expected in March of this year. Study 302 is identical in design to Study 301 with sites in the United States and Canada. Subject to the results of Study 302, Anacor plans to file an NDA for tavaborole in the middle of this year. Conference Call and Webcast Anacor will host a conference call today at 8:00 a.m. ET / 5:00 a.m. PT to discuss the results of this Phase 3 trial of tavaborole in onychomycosis. The call can be accessed by dialing (877) 291-1367 (domestic) and (914) 495-8534 (international) five minutes prior to the start of the call. The call will also be webcast live and can be accessed on the Events and Presentations page, under Investors, on the company’s website at http://www.anacor.com and will be available for three months following the call. About Anacor Pharmaceuticals Anacor is a biopharmaceutical company focused on discovering, developing and commercializing novel small-molecule therapeutics derived from its boron chemistry platform. Anacor has discovered eight compounds that are currently in development. Its two lead product candidates are topically administered dermatologic compounds — tavaborole, a topical antifungal for the treatment of onychomycosis, and AN2728, a topical anti-inflammatory PDE-4 inhibitor for the treatment of atopic dermatitis and psoriasis. In addition to its two lead programs, Anacor has discovered three other wholly-owned clinical product candidates — AN2718 and AN2898, which are backup compounds to tavaborole and AN2728, respectively, and AN3365 (formerly known as GSK2251052, or GSK ‘052), a systemic antibiotic for the treatment of infections caused by Gram-negative bacteria, which previously was licensed to GlaxoSmithKline LLC, or GSK. GSK will be returning all rights to the compound to us and we are considering our options for further development, if any, of this compound. We have discovered three other compounds that we have out-licensed for further development — two compounds for the treatment of animal health indications that are licensed to Eli Lilly and Company and AN5568, also referred to as SCYX-7158, for human African trypanosomiasis (HAT, or sleeping sickness), which is licensed to Drugs for Neglected Diseases initiative, or DNDi. We also have a pipeline of other internally discovered topical and systemic boron-based compounds in development. For more information, visit http://www.anacor.com. Forward-Looking Statements This press release may contain forward-looking statements that relate to future events including the development of tavaborole, timing for filing of a new drug application, or NDA, related to tavaborole and the potential commercialization of tavaborole. These forward looking statements involve known and unknown risks, uncertainties and other factors that could cause actual levels of activity, performance or achievement to differ materially from those expressed or implied by these forward-looking statements, including risks related to whether the results of the ongoing Phase 3 302 study will be successful and sufficient to support the planned NDA filing, risk of unforeseen side effects and risks related to regulatory approval and commercialization of new drug candidates. Reference should be made to Anacor’s Annual Report on Form 10-K for the year ended December 31, 2011, filed with the Securities and Exchange Commission under the heading “Risk Factors” and Anacor’s subsequent Quarterly Reports on Form 10-Q for a more detailed description of such factors. These statements reflect the views of Anacor as of the date of this press release with respect to future events and, except as required by law, it undertakes no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise after the date of this press release.