How high is too high for your blood sugar?

http://www.fmcsa.dot.gov/rules-regu...?rule_toc=760&section=391.43&section_toc=1782

 

normal readings are from 80-120, but I am not sure at what point it is considered to high.

They check your urine anyhow, so it is not like the prick your finger to check the blood sugar. I think they dip it (the urine) for the presence of protein and sugar

 

The normal ranges are between 70-110. These are the safe zones.

The blood sugar will raise to about 140 shortly after eating. It is one of the reasons you should not eat before your physical. If the level stays at the 140 for a few hours after, this can indicate the body having problems with the glucose.

I have had people lose conciousness with a blood sugar of 65. It basically depends on the person. I have had people whose normal is over 300. They of course do not have CDL's because they are insulin dependent.

Sabine is correct on the normals she stated because they would not cause a red flag.

 

From the Mayo Clinic
http://www.mayoclinic.com/health/blood-sugar/SA00102/SI=2279

What level suggests prediabetes?
If your random blood sugar level is higher than 140 mg/dL but lower than 200 mg/dL, you may have prediabetes.

What level suggests type 1 or type 2 diabetes?
A random blood sugar level higher than 200 mg/dL suggests either type 1 or type 2 diabetes. Remember, your blood sugar level alone isn't enough to differentiate between type 1 and type 2 diabetes. Your doctor may do other tests to determine which type of diabetes you have.
Oral glucose tolerance test
What is an oral glucose tolerance test?
An oral glucose tolerance test measures your body's response to sugar. First your fasting blood sugar level is measured. Then you drink a sugary solution. Your blood sugar level is measured after one hour and again after two hours. If your blood sugar level rises more than normal, you may have diabetes.
For this test to be accurate, it's important to eat normally and be in good health. Even a cold can affect the results. So can inactivity or certain medications. A modified version of the oral glucose tolerance test, known as a glucose challenge test, is often used to screen pregnant women for gestational diabetes.
What's normal?
A normal blood sugar level after an oral glucose tolerance test is lower than 140 mg/dL.
What level suggests prediabetes?
If your blood sugar level is 140 mg/dL to 199 mg/dL after an oral glucose tolerance test, you may have prediabetes.
What level suggests type 1 or type 2 diabetes?
A blood sugar level of 200 mg/dL or higher two hours after you drink the sugary solution may indicate diabetes. Your doctor may repeat this or other tests to confirm the diagnosis.

Glycated hemoglobin (A1C) test
What is a glycated hemoglobin (A1C) test?
An A1C test, also known as a glycated hemoglobin test, isn't used for diagnosing prediabetes or diabetes. Instead, it gauges how well you're managing your diabetes.
Unlike a fasting blood glucose test or a daily finger stick, both of which measure your blood sugar level at a given time, the A1C test reflects your average blood sugar level for the past two to three months. Test results show what percentage of your hemoglobin — a protein found in red blood cells — is sugar coated (glycated).
What's normal?
The normal range for people without diabetes is 4 percent to 6 percent. An A1C level lower than 7 percent is a common target for people with diabetes — although your doctor may recommend a level lower than 6 percent if you're pregnant or have other health concerns. An A1C level higher than 7 percent may indicate the need for a change in your diabetes treatment plan.
The normal range for A1C results may vary somewhat among labs. If you consult a new doctor or use a different lab, it's important to consider this possible variation when interpreting your test results.

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It is based on each individual. As a paramedic, I have transported many to the ER. The level of some can be that high. I have had a couple with BS of 30. Very trying transports. We are 25 minutes from the hospital.