What Number Is Considered High Potassium?

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Potassium is an essential mineral needed by the body to perform various functions. It helps to maintain a healthy heart, regulate blood pressure, and support muscle and nerve function. However, too much of it in the blood can lead to health problems. So, what number is considered high potassium? Let’s find out!

Normal Range of Potassium Levels

The normal range of potassium levels in the blood is between 3.5 and 5.0 millimoles per liter (mmol/L). Anything below or above this range is considered abnormal and may require medical attention.

High Potassium Levels

High potassium levels, also known as hyperkalemia, occur when the potassium level in the blood exceeds 5.0 mmol/L. This can be caused by various factors such as kidney disease, medications, and certain medical conditions.

Symptoms of High Potassium Levels

Some of the symptoms of high potassium levels include muscle weakness, fatigue, nausea, and irregular heartbeat. In severe cases, it can lead to cardiac arrest and even death.

Treatment for High Potassium Levels

If you have high potassium levels, your doctor may recommend changes in your diet or medication. In some cases, you may need to undergo dialysis or other medical procedures to lower your potassium levels.

Prevention of High Potassium Levels

To prevent high potassium levels, it’s important to maintain a healthy diet and avoid foods that are high in potassium such as bananas, avocados, and spinach. If you have kidney disease or are taking medications that can cause high potassium levels, talk to your doctor about ways to manage your condition.


In conclusion, high potassium levels can be harmful to your health and require medical attention. It’s important to know what number is considered high potassium and take steps to prevent or manage it. If you have any concerns about your potassium levels, talk to your doctor.


  • National Kidney Foundation. (2023). High Potassium (Hyperkalemia). Retrieved from https://www.kidney.org/atoz/content/high-potassium
  • Mayo Clinic. (2023). Hyperkalemia. Retrieved from https://www.mayoclinic.org/diseases-conditions/hyperkalemia/symptoms-causes/syc-20373399