Exploratory Study of ZG-801 for the Treatment of Hyperkalemia

Inclusion Criteria: * Males and females ages 18 - 80 * Informed consent given * Serum Potassium measurement at baseline is 5.1 to \< 6.5 mEq/L (Non-dialysis patients or 5.5 to \< 6.5 mEq/L (Dialysis patients) Exclusion Criteria: * Subjects with hospitalization for hyper- or hypoglycemia with Type 2 diabetes or for acute exacerbations of heart failure within the previous 3 months * Subjects with severe heart failure, defined as NYHA (New York Heart Association) class IV * Subjects with uncorrected hemodynamically significant primary vascular disease or uncontrolled or hemodynamically unstable arrhythmia * Subjects with coronary artery bypass graft, percutaneous intervention, or major surgery including thoracic and cardiac, within the previous 3 months or anticipated need during study participation * Subjects with heart, liver (only Dialysis patients), or kidney transplant recipient, or anticipated need for transplant during the study period * Subjects with any of the significant cardiovascular or cerebrovascular events within the previous 2 months * Subjects with a history of or current diagnosis of a severe swallowing disorder, moderate to severe gastroparesis, or history of bariatric surgery, bowel obstruction or severe gastrointestinal disorders or major gastrointestinal surgery * Subjects who cannot use the oral concomitant medication to be separate 3 hours from ZG-801 medication * Subjects suspected of transient high potassium levels, such as those caused only by dietary effects