Potassium chloride Er is a drug used in the treatment of hypokalemia or low blood potassium levels. Potassium is needed by the body for many important processes, including regulating heartbeat.
Low potassium levels may arise, for instance, in patients with certain diseases - such as kidney disease - or in patients taking certain medicines or suffering the long-term effects of a disease (prolonged diarrhea and vomiting can cause hypokalemia).
Potassium chloride Er is an extended-release formulation - intended to deliver to the body the required level of potassium that it needs. Potassium is an essential mineral, and potassium chloride Er mimics its effects.
Common side effects with potassium chloride Er include nausea, upset stomach, and diarrhea.