Is a fasting blood sugar of 145 normal?
A fasting blood sugar of 145 mg/dL (8.1 mmol/L) on a lab test is in the diabetes range, so see your doctor. One result needs a second test to confirm it, unless it's clearly high. Call today if you're very thirsty, peeing a lot or losing weight without trying.
NormalPrediabetes rangeDiabetes range
What it means
Fasting means 8 hours or more with no calories, water only. Under 100 mg/dL (5.6 mmol/L) is normal, 100 to 125 (5.6 to 6.9) is the prediabetes range, and 126 (7.0) or more is the diabetes range. 145 sits 19 points over the diabetes line.
Can this number decide it?
Only a lab test decides a band, and a diagnosis takes two results unless the number is clearly high. A finger-stick meter or a sensor can't diagnose, and a sensor runs higher than your blood.
What to do
See your doctor and book the second test this week. Take this number with you.
When to get help now
Call 911 or go to the ER if a blood sugar stays at 300 or more, or comes with vomiting so you can't keep fluids down, fruity breath or hard breathing. Under 70 with confusion, fainting or trouble swallowing is an emergency too. Pregnancy uses tighter numbers, so take any number to your midwife or doctor, and if you take insulin or a sulfonylurea, your targets come from your prescriber.
