A low level of the electrolyte potassium in the blood. Potassium is important to the proper functioning of nerve and muscles cells, particularly heart muscle cells.

When to seek immediate medical care

See a health care professional immediately if there is:

  • An irregular heart rhythm.
  • Low blood pressure.

When to make a doctor's appointment

Make an appointment to see a health care professional if there are signs of:

  • Fatigue or weakness.
  • Muscle cramps.
  • Constipation.

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