Low blood sugar: signs and what to do
Low blood sugar can happen to anyone who takes insulin or some diabetes medicines. If you know the signs and what to do, you can act quickly.
If the person is unconscious, can't swallow, or is having a seizure: call 9999 straight away. Don't put food or drink in their mouth. Turn them onto their side.
When is blood sugar low?
- Below 3.9 mmol/L (70 mg/dL): low, and needs treating.
- Below 3.0 mmol/L (54 mg/dL): a significant low.
- Severe low: when the person needs someone else's help, for example because they're confused or unconscious.
Signs
- Hunger, sweating, chills
- Shaking, feeling nervous or anxious
- Fast heartbeat
- Dizziness
- Confusion or trouble concentrating
The 15-15 rule
- Take 15 grams of fast-acting sugar: glucose tablets, glucose gel, or juice.
- Wait 15 minutes and check your blood sugar again.
- If it's still below 3.9 mmol/L, repeat.
- Once it's back to normal, have a meal or snack if your next meal is a while away.
Severe lows and glucagon
If your doctor has prescribed glucagon, make sure your family or people around you know where it is and how to use it. Once glucagon has been given, call 9999 straight away.
After any low: log it, and talk to your doctor if lows keep happening. Your medicines may need adjusting.
This is general information and does not replace your doctor. Decisions about your treatment or medicines stay with your doctor. In an emergency, call 9999.
Sources
- American Diabetes Association. Severe hypoglycemia: what to know. Link