How to Treat a Low


Surviving a Hypoglycemic Episode

Experiencing a hypoglycemic, or low blood sugar, episode can be scary—for both those with diabetes and those people around them. Prompt and appropriate treatment of hypoglycemic episodes is critical to avoiding an emergency situation, so make sure you're always prepared with a fast-acting carbohydrate source, blood testing supplies, and medical identification. And share the information with friends, family, and co-workers so that they know how to help should you be unable to treat yourself.

If you experience any hypoglycemic symptoms, including sweating, lightheadedness, shakiness, confusion, anxiety, unexplained anger, hunger, and fatigue, act quickly to bring your blood sugars back to safe levels.

Here's how:

1. Take a blood glucose reading. Get help if you don't think you can operate your glucose monitor. If your blood sugars are less than or equal to 70 mg/dl (3.9 mmol/l), or if they are below the lower safety limit set by you and your doctor, proceed to step two immediately.

2. Take 15 grams of a fast acting carbohydrate, such as:

  • 2 or 3 glucose tablets


  • 1/2 cup (4 ounces) of any fruit juice


  • 1/2 cup (4 ounces) of a regular (not diet) soft drink


  • 5 or 6 pieces of hard candy


  • 1 or 2 teaspoons of sugar or honey


  • Glucose gel or cake frosting in a tube (see package for measurement) IMPORTANT: If you lose consciousness, no one should attempt to give you food or drink due to the risk of choking and/or aspiration. Instead, you should be given a glucagon injection (if available) and emergency medical personnel should be called to the scene.

3. Sit down and wait fifteen minutes, then test blood glucose levels again. If it is still too low, have another 15 grams of fast acting carbs. Repeat steps one through three until your blood glucose is at least 70 mg/dl (3.9 mmol/l). It's important to follow the 15 grams/15 minute rule, as over-treating a low can send your blood sugars on a dangerous roller coaster ride.

4. If it will be an hour or more before your next meal, have a snack.

If you don't have a meter to test with and are experiencing hypoglycemic symptoms, err on the side of caution and assume you are low. Always wear medical identification so that in the event you lose consciousness, others will know how to help you. And once the low has passed, think about what may have caused it. Was it too much insulin, a delayed meal, or something else? If you can't determine the culprit, make a note of the circumstances surrounding lows when they occur and see if you can determine a pattern. Always discuss frequent hypoglycemic episodes with your doctor.

Reviewed by Francine Kaufman, MD. 4/08

Last Modified Date: June 17, 2013

All content on is created and reviewed in compliance with our editorial policy.

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by Brenda Bell
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