What are the signs and symptoms of hypokalemia (low potassium)?

Updated: Dec 06, 2018
  • Author: Eleanor Lederer, MD, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Patients are often asymptomatic, particularly those with mild hypokalemia. Symptoms that are present are often from the underlying cause of the hypokalemia rather than the hypokalemia itself. The symptoms of hypokalemia are nonspecific and predominantly are related to muscular or cardiac function. Complaints may include the following:

  • Weakness and fatigue (most common)

  • Muscle cramps and pain (severe cases)

  • Worsening diabetes control or polyuria

  • Palpitations

  • Psychological symptoms (eg, psychosis, delirium, hallucinations, depression)

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