Milliequivalents Per Litre (mEq/L)

Some medical tests report results in milliequivalents per litre (mEq/L).

  • An equivalent is the amount of a substance that will react with a certain number of hydrogen ions. A milliequivalent is one-thousandth of an equivalent.
  • A litre measures fluid volume. It is a little bigger than a quart.

Is it an emergency?

If you or someone in your care has chest pains, difficulty breathing, or severe bleeding, it could be a life-threatening emergency. Call 9-1-1 or the local emergency number immediately.
If you are concerned about a possible poisoning or exposure to a toxic substance, call Poison Control now at 1-800-567-8911.

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