How to be prepared to deal with hypoglycaemia

  • Monitor your blood glucose levels frequently
  • Carry quick-acting carbohydrates with you at all times, so that you are always prepared to treat hypoglycaemia

"Tell your family and friends what symptoms to look out for and what to do, in case you are not able to treat hypoglycaemia yourself," advises Dr Amanda Lam, Associate Consultant at the Department of Endocrinology, Singapore General Hospital (SGH), a member of the SingHealth group.

How to treat low blood glucose using the 15/15 rule

Step 1:

If you experience symptoms of hypoglycaemia, check your blood glucose using your glucometer. If your blood glucose is < 4.0 mmol/L, eat or drink 15 g of fast-acting carbohydrates immediately.

Examples of fast-acting carbohydrates include:

What to eat for hypoglycaemia4-5 glucose tablets, or 

What to eat for hypoglycaemia1/2 can of soft drink (150ml-200ml), or

What to eat for hypoglycaemia1/2 glass of fruit juice (150ml), or 

What to eat for hypoglycaemia3 teaspoons sugar with half cup water

If you have symptoms of low blood glucose, but cannot check your blood glucose immediately, eat or drink 15g of fast-acting carbohydrates to be safe.

Avoid using these types of foods to treat low blood glucose, as it will take too long to increase your blood glucose levels:

Foods to avoid for hypoglycaemia Any food or drink containing fat or protein

Any item that requires a lot of prolonged chewing/sucking

Step 2:

Wait for 15 minutes, and then re-test your blood glucose.

Wait for 15mins to re-test blood glucose levels

Step 3:

If your blood glucose is still low (< 4.0 mmol/L), repeat steps 1 to 3. If your blood glucose is 4.0 mmol/L and above, proceed to step 4.

Step 4:

Blood glucose levels may fall again about 1 hour after you have treated your hypoglycaemia. If your next meal is more than 1 hour away, eat an additional snack containing 15g of longer-acting carbohydrates.

Examples include:

What to eat for hypoglycaemia 3 pieces of biscuits, or

What to eat for hypoglycaemia 1 slice of bread

When should you go to the hospital?

A family member or friend should take you to the hospital or call an ambulance (995) immediately if you:

  • Continue to have low blood glucose (< 4.0 mmol/L) after repeated treatments with fast-acting carbohydrates
  • Have a seizure
  • Are unconscious because of a hypoglycaemia episode

See the previous page for warning signs and symptoms of hypoglycaemia (low blood glucose).

Ref: L20

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Diabetes Diet Myths vs Facts

Easy Diabetes Diet

Tips for Travelling with Diabetes

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