(Dilutional Hyponatremia; Euvolemic Hyponatremia; Hypervolemic Hyponatremia; Hypovolemic Hyponatremia)
How to Say It: hahy-po-nuh-TREE-mee-uh
by Cynthia M. Johnson, MA
Hyponatremia is a low level of sodium in the blood. It can be deadly if it is not treated.
This problem happens when there is too much water for the amount of sodium in the body.
This problem may be caused by:
This problem is more common in older adults. Other things that may raise the risk are:
Problems may be:
You will be asked about your symptoms and health history. A physical exam will be done.
Blood and urine tests will be done to check sodium levels.
Treatment depends on what is causing the problem and how severe symptoms are. The goal is to slowly raise sodium levels. Options are:
The risk of this problem may be lowered by drinking only as much fluid as is needed to meet thirst. Long or intense activity may need drinks with electrolytes.
American Society for Nutrition
National Institute of Diabetes and Digestive and Kidney Diseases
The College of Family Physicians of Canada
Hyponatremia. EBSCO DynaMed website. Available at: https://www.dynamed.com/approach-to/hyponatremia-approach-to-the-patient. Accessed August 19, 2021.
Hyponatremia. Merck Manual Professional Version website. Available at: https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/electrolyte-disorders/hyponatremia. Accessed August 19, 2021.
Last reviewed July 2021 by EBSCO Medical Review Board James Cornell, MD
Last Updated: 8/19/2021
EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
To send comments or feedback to our Editorial Team regarding the content please email us at email@example.com. Our Health Library Support team will respond to your email request within 2 business days.
All rights reserved.