Hyponatremia occurs when sodium levels in the blood are too low. Sodium chloride is the chemical name for salt. Sodium is an electrolyte that regulates the amount of water in your body. Sodium also plays a part in nerve impulses and muscle contractions. Sodium chloride is used to treat or prevent sodium loss caused by dehydration, excessive sweating, or other causes.

When the body has low sodium which is not very common, it can lead to hyponatermia.  Symptoms include lethargy, confusion, and fatigue. It can result from underlying conditions, such as kidney failure, or other factors, such as drinking too much water or taking certain medications.

The definition of a low sodium level is below 135 milliequivalents per liter (mEq/L).

Daughter was found to have very low sodium levels of 119 .   So they have to IV her sodium chloride to normalize the level.


If the low sodium condition worsens, people may experience symptoms, such as:

  • vomiting
  • muscle twitches
  • seizures

Severe hyponatremia occurs when levels drop below 125 mEq/L. Health issues arising from extremely low sodium levels may be fatal.

Hyponatremia is the most common electrolyte disorder that doctors encounter. Research suggests that approximately 1.7 percent of people in the United States have the condition. It is more prevalent among people with cancer.