by Rick Alan
Glucose is a type of sugar. It is your body's main source of energy. Hypoglycemia is a condition where the level of glucose in your blood becomes low enough to cause symptoms. When blood glucose drops too low, your body does not have enough energy to function properly.
Medications for diabetes are the most common cause, particularly when combined with the following factors:
Reactive hypoglycemia may also occur in people without diabetes. It is thought to be rare.
Other causes of hypoglycemia include:
Factors that may increase your chances of hypoglycemia:
Symptoms may come on slowly or suddenly. Hypoglycemia may cause:
As hypoglycemia worsens, it may cause:
If you have frequent hypoglycemia, you may lose many of the early symptoms and be at particular risk of sudden loss of consciousness, seizure, or bizarre behavior. This could affect your ability to operate machinery or a motor vehicle. You will need to discuss any special instructions with your doctor.
You will be asked about your symptoms and medical history. A physical exam will be done.
If hypoglycemia is suspected, your doctor will try to document your low blood sugar. Your blood glucose levels will be measured while you are having symptoms.
If you do not have diabetes, and you do not take medications that lower your blood sugar levels, other tests may be done to see if and why you are having low blood sugar levels. These tests may include checking your blood levels after periods of not eating.
Talk with your doctor about the best treatment plan for you. Options include:
Symptoms of low blood sugar can be relieved quickly by:
Some people who have prolonged or severe hypoglycemia take glucagon. Glucagon is an injectable hormone. It raises blood sugar levels.
Some cases of hypoglycemia are caused by a tumor. In this case, the tumor may need to be removed.
To help reduce your chance of hypoglycemia:
If you are prone to severe hypoglycemia:
American Diabetes Association
Hypoglycemia Support Foundation
Canadian Diabetes Association
Hypoglycemia (low blood glucose). American Diabetes Association website. Available at:
...(Click grey area to select URL)
Updated July 1, 2015. Accessed October 2, 2017.
Hypoglycemia in diabetes. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T116035/Hypoglycemia-in-diabetes. Updated February 7, 2017. Accessed October 2, 2017.
Hypoglycemia in persons without diabetes. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T904908/Hypoglycemia-in-persons-without-diabetes. Updated February 23, 2015. Accessed September 28, 2016.
Low blood glucose (hypoglycemia). National Institute of Diabetes and Digestive and Kidney Diseases website. Available at:https://www.niddk.nih.gov/health-information/diabetes/overview/preventing-problems/low-blood-glucose-hypoglycemia. Updated August 2016. Accessed October 2, 2017.
Last reviewed September 2017 by EBSCO Medical Review Board
Marcin Chwistek, MD
Last Updated: 9/30/2014
Copyright © 2017 EBSCO Publishing All rights reserved.
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