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Achillion Pharmaceuticals, Inc. (NASDAQ:ACHN) is a clinical-stage biopharmaceutical company focused on advancing its orally administered factor D inhibitors into late-stage development and commercialization. Factor D is an essential protein within the amplification loop of the alternative pathway of the complement system. Achillion is focusing its drug development activities on alternative pathway-mediated, rare diseases where there are no approved therapies or where existing therapies are inadequate for patients.

Experts believe the alternative pathway plays a critical role in a number of disease conditions including rare orphan conditions such as C3G and immune complex membranoproliferative glomerulonephritis, or IC-MPGN, both diseases affecting the kidney, and PNH, a blood disorder, as well as several more prevalent indications.

The Company’s first-generation factor D inhibitor, ACH-4471, has demonstrated preliminary clinical proof-of-concept in patients with C3 glomerulopathy, or C3G, a disease affecting the kidney, and paroxysmal nocturnal hemoglobinuria, or PNH, a blood disorder, and has advanced into phase II clinical trials in both diseases.In addition to ACH-4471, we have two potent and specific orally-administered second generation factor D inhibitors in phase I clinical trials, ACH-5228 and ACH-5548.

To advance its investigational drugs into phase 3 and commercialization, the Company plans to work closely with key stakeholders including patients, payors, regulators and healthcare professionals.

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Investor and Media Contact

Brian DiDonato
Vice President, Investor Relations & Corporate Communications
Tel. (203) 752-5452
bdidonato@achillion.com