Higher-than-normal levels of potassium in the blood, a condition known as hyperkalemia, may cause serious complications. Potassium is an important mineral involved in muscle function, digestion and metabolism. The normal blood level for potassium is 3.6 to 4.8 milliequivalents per liter or mEq/L. Blood potassium over 6 mEq/L is a medical emergency, according to MayoClinic.com.
Symptoms
High potassium levels often do not cause any symptoms; however, sometimes people may notice an irregular heartbeat or experience nausea. Sometimes the pulse is affected, and it can be either slower than normal, weak or even disappear altogether.
Complications
High potassium levels can cause disruptions in the heart rhythm that can be dangerous, according to MedlinePlus. Elevated levels may even cause the heart to stop. Hyperkalemia may also disrupt normal nerve and muscle function, causing loss of muscle control, paralysis and muscle weakness or tiredness.
When to Seek Medical Care
Some people may tolerate hyperkalemia well, but others experience deadly complications. Emergency care is needed if a patient experiences absent or weak heartbeat, changes in breathing, loss of consciousness, nausea or fatigue.
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