You've been reading about how to lower your blood sugar levels. It is possible
for your blood sugar to go too low, however, especially with insulin or certain
Low blood sugar, known as hypoglycemia, only occurs as a result of
treating your diabetes. If you are not taking pills or insulin, you should
not experience blood sugar that is too low. You have hypoglycemia when your
blood sugar falls below 70mg/dl.
The most common causes of hypoglycemia are:
- Taking too much insulin or diabetes medication
- Not eating enough food at your meals or snacks
- Missing or delaying your meal
- Getting more exercise than usual, without changing your foods or medications.
- Drinking alcohol without eating food
Certain symptoms will warn you that your blood sugar is getting dangerously
low. Be on the lookout for:
- Feeling tired
- Nervousness or anxiety
- Feeling irritable
What to do
If any of these symptoms occur and you have a blood sugar test kit available,
check your blood sugar. (See Step 5: Monitor Your
Blood Sugar.) If the level is low (70mg/dl), you need to treat your
low blood sugar right away. Eat one of the following sugar-containing foods,
which will provide you with about 15 grams of carbohydrate:
- 3 glucose tablets
- Half cup (4 ounces) of fruit juice or regular soda
- 6 or 7 hard candies
- 1 tablespoon of sugar
Wait about 15 minutes for the sugar to get into your blood. This wait can
be hard because of the uncomfortable symptoms you are feeling, but if you eat
too much sugar, you will make your blood sugar go too high.
If you don't feel better in 15 minutes:
- Eat something with sugar in it again.
- Check your blood sugar. If it has come into a safer range (over 70mg/dl),
and your meal is more than an hour away, eat a snack that contains carbohydrate
and protein. Examples include either cheese and crackers or a glass of milk.
This combination of steps will almost always bring your blood sugar into the
safe range. If it doesn't work, call your doctor right away.
This method of treating low blood sugars is called the 15:15 rule.
Eat 15 grams of carbohydrate and wait 15 minutes.
Remember: Use simple sugar first to get the situation under control. Eating
candy with a lot of fat (like chocolate) might seem like a good idea, but it
won't bring your blood sugar up fast enough.
People with diabetes should wear or carry I.D. information that emergency
medical staff can find. If you are on medication that can cause hypoglycemia, always carry
a sugar-containing snack like glucose tablets, lifesavers, or raisins.
Review Date: 5/1/2006
Reviewed By: Alan Greene, M.D., F.A.A.P., Department of Pediatrics, Packard Children's Hospital, Stanford University School of Medicine; Chief Medical Officer, A.D.A.M., Inc.
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