Relypsa Announces FDA Acceptance of New Drug Application for Patiromer for Oral Suspension to Treat Hyperkalemia

Relypsa, Inc. RLYP, today announced that the U.S. Food and Drug Administration (FDA) has accepted for filing the New Drug Application (NDA) for Patiromer for Oral Suspension (Patiromer FOS) for the treatment of hyperkalemia, a serious condition defined as abnormally elevated levels of potassium in the blood. Relypsa expects written notification of NDA acceptance along with the Prescription Drug User Fee Act (PDUFA) date (the expected date for completion of FDA review of the NDA), as well as a preliminary indication regarding the need for an Advisory Committee meeting, in the day-74 letter from the FDA in early January 2015. The NDA is supported by eight clinical trials, including a Phase 3 program that was conducted under a Special Protocol Assessment, a long-term treatment trial that evaluated the safety and efficacy of Patiromer FOS in patients for up to one year, and an onset-of-action study that evaluated the time to potassium lowering action. "Acceptance of our NDA is a significant milestone that triggers greater intensification of our steps toward commercial readiness," said John A. Orwin, president and chief executive officer. "If approved, we believe Patiromer FOS may be the first new therapeutic innovation available to treat patients with hyperkalemia in both acute and chronic settings in over 50 years. We also believe there is a significant unmet medical need for patients, particularly as it relates to chronic therapy, and we are planning for broad access to the drug. Based on the robust data which demonstrated the early onset of action and favorable safety profile for up to one year, we believe that Patiromer FOS, if approved, will become an important new treatment option for patients with hyperkalemia." Last month, the company announced that results from the pivotal Phase 3 program of Patiromer for Oral Suspension were published in the New England Journal of Medicine. About Hyperkalemia Hyperkalemia, a serious condition defined as abnormally elevated levels of potassium in the blood, is frequently prevalent in patients who suffer from chronic kidney disease, hypertension, diabetes and/or heart failure. Hyperkalemia can lead to life-threatening cardiac arrhythmia and sudden death. Patients with chronic kidney disease or heart failure are at particular risk for developing hyperkalemia, especially those treated with renin-angiotensin-aldosterone-system (RAAS) inhibitors such as ARBs (Angiotensin Receptor Blockers), AAs (Aldosterone Antagonists), and ACE (Angiotensin-Converting-Enzyme) inhibitors. Although RAAS inhibition has been shown to protect kidney and cardiac function, many patients who could benefit from RAAS inhibitors are untreated or undertreated due to the undesirable side effect of increasing serum potassium.
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