ZS Pharma is a privately held specialty pharmaceutical company based in Coppell, Texas, and Menlo Park, CA. Its core focus is the research and development of highly selective ion-trap therapies to treat serious medical conditions. The company'ss therapeutic candidate, ZS-9, is a novel treatment for hyperkalemia, a life-threatening condition that affects patients with chronic kidney disease, hypertension, diabetes, and/or chronic heart failure. Hyperkalemia is characterized by abnormally high concentrations of potassium in the blood. ZS-9 is currently being tested in late-stage clinical trials.