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Also known as: K
Formal name: Potassium, blood or urine

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At a Glance

Why Get Tested?

To determine whether your potassium level is within normal limits; to help evaluate electrolyte balance; to help determine the cause of and monitor treatment for illnesses associated with abnormal potassium levels in the body

When to Get Tested?

When you have symptoms such as muscle weakness and/or irregular heart beat (cardiac arrhythmia) or when an electrolyte imbalance is suspected; at regular intervals when you are taking a medication and/or have a disease or condition, such as high blood pressure (hypertension) or kidney disease, that can affect your potassium level; as part of a routine medical exam

Sample Required?

A blood sample drawn from a vein in your arm; sometimes a random or 24-hour urine sample

Test Preparation Needed?