What is considered a high potassium level?

Potassium levels above 5.0 milliequivalents per liter indicate a high potassium level, also called hyperkalemia, according to MedicineNet. Normal potassium levels fall between 3.5 to 5.0 milliequivalents per liter.

According to WebMD, potassium levels are associated with sodium levels. When sodium levels drop, potassium levels rise. In addition, the kidneys and adrenal glands produce hormones that influence potassium levels.

Many situations may cause high potassium levels. According to WebMD, hyperkalemia can be caused by severe vomiting, potassium supplements and medications such as diuretics. High potassium levels also point to advanced kidney failure, alcoholism and type 1 diabetes, according to the Mayo Clinic.