The most common causes of high potassium levels are chronic kidney disease and acute kidney failure, according to Mayo Clinic. In these two cases, a person's kidneys cease to function properly and are unable to filter ex... More » Health Pain & Symptoms

Medications that sometimes cause high potassium levels include certain antibiotics, blood pressure medication and herbal supplements, explains WebMD. Other medications that increase the amount of potassium in the blood a... More » Health Medications & Vitamins Side Effects

A high blood potassium level, known as hyperkalemia, can cause muscle fatigue, weakness, paralysis, nausea and heart rhythm problems, according to Mayo Clinic. In severe cases of hyperkalemia, the heart rate may become e... More » Health Medical Ranges & Levels
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