Fresenius Medical Care North America recalled their Naturalyte and Granuflo Acid Concentrate products used in hemodialysis treatment due to the risk of inappropriate prescription leading to metabolic alkalosis in patients. Metabolic alkalosis poses serious health risks such as low blood pressure, hypokalemia, hypoxemia, hypercapnia and cardiac arrhythmia, which could result in cardiopulmonary arrest or death if not treated properly. The recall involved liquid and powder acid concentrate products manufactured between January 2008 and June 2012.