I use 200 myself. Kinda miss doing odd units but not too big a deal.
OK, I guess this is why U100 would work better for me. I wouldnāt just go from 8 to 10 units, Iām very insulin sensitive. Iāll just draw up with my syringe then. thanks.
NO! You can not measure u200 insulin in a syringe thatās calibrated for u100!!!
Just use the penā¦ Take 8uā¦ See how it goes:) youāll love it
Ahhhhh, nooooo, donāt do that!
Youāre still missing something!!!
Your syringe measures volume NOT units!!! If you use your syringe, you will be making a very big mistake!!!
An insulin pen is designed to deliver the number of units you dial up; it measures the number of units automatically.
huhā¦a unit is a unitā¦youāre not making sense. I draw up from my syringe all the timeā¦a unit is a unit whether itās measure on a pen or a vial or syringe?
Please explain to Sam and I that you understand what we are trying to tell you.
I canāt speak for Sam on this, but I know that I will likely lose some sleep worrying about you if you cannot demonstrate an understanding of what we are trying to explain to you. If you donāt understand, you could be making a very dangerous error in dosing!!!
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NOT TRUE!
One unit on your syringe equals one unit of U-100 insulin, NOT one unit of U-200 insulin.
Iām not going to do anything, take anything until I actually talk with my endo about this. Donāt worry. I will stay with my levemir until Iām certain SHE - my Endo wants me on U200 because Iām very insulin sensitive and wouldnāt increase a dose by 2 units of basal. if a unit is indeed a unit. thanks!
A unit is a unit in terms of how much medicine it contains and how it will affect your blood sugar. It is not a volume measurement. The entire reason that the term āunitā was adopted with insulin instead of cc, ml, whatever-- is so that people can take different āstrengthsā of insulin but have them all standardized so that a unit is a unit of actual medicine regardless of how much liquid is involved. Your syringes are marked and calibrated to measure u100 insulin, meaning that one cc of the liquid in your syringe contains 100 units of insulin.
U200 would require a different syringe in which one cc contained 200. If you measure 8u of u200 tresiba with your u100 syringe, you will actually be injecting 16 units of the medication. Donāt do that.
Just use the pen.
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OHā¦OKā¦I understand now. I didnāt know the syringes were specific. OMG, Iām so glad I came on hereā¦THANK YOU! Iām still not going to do anything until I talk with Endo. I want the U100 I think. I do 1u or sometimes .5 changes with basal and want to draw up using a syringe.
THANK YOU! THANK YOU for your help!
Thanks, Sam. Got it! 
Do you still doubt that a unit is a unit?!?
And do you understand that a syringe measures volume NOT units? The Levemir you are currently using contains one unit of insulin in the amount that is measured by the ā1ā marking on the syringe. That is because it is U-100 insulin.
With the U-200 pen, the 2-unit mark measures out 2 units of Tresiba insulin because it is calibrated to do that.
Iāll repeat what Sam said: Just use the pen.
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Yes, thanks. OMG, seriously. I just happened to notice it was U200 and decided to come on here to ask all of you about it. I had no idea about the syringes U100 vs. U200. Seriously, I would have just drawn up with a syringe tonight and could have been in such big trouble. taking 16 units. OMG! THANK YOU! Iām almost crying right now cuz I could have been in big trouble with a huge dose of basal on board. 
I guess too Iāve never liked using a pen because from my past experiences I canāt really see whatās drawn up and how much really goes in?
KatieY12, thank G-d for TuD! Donāt know where Iād be without everyone!!!
I am so very relieved and happy to hear that you are not headed for a Tresiba overdose tonight!!! 
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YES. thank you, thank you! I just had major inpatient surgery not too long ago, 6 days in hospitalā¦Iām recovering but am still taking a small PM dose of pain medication. I could have been in big trouble overnight, not waking up from a lowā¦yikes
This whole discussion of U100 vs. U200 insulin dosing reminds of when I first started taking insulin using a vial and syringe back in 1984. I remember that the doctors and nurses made a big deal that the syringe calibration matched the insulin strength.
At the time there was still some U40 insulin being used and things were standardizing around U100. Apparently there were many overdosing horror stories of people drawing up U100 insulin in U40 syringes.
It made sense to standardize around U100 insulin and syringes to avoid this potential error. Now with the introduction of U200, U300, and U500 insulin the confusion returns. Maybe if all these different strength variations are only packaged in pens then it prevents this mistake.
Katie says she has U200 insulin but U100 syringe. Is this true or does she really have a U200 Tresiba pen which would keep her safe from this error?
Katie, Iām confused, too.
The confusion only exists when people get creative and try to do things like draw from a pen into a syringe. Once again proof positive that making things more complicated than they should be is rarely a good idea. In diabetes, and in life.
Glad we were able to head off that mistake.
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I looked at the Tresiba website and also the package insert and only found it packaged in Flex-Pens. Iām not sure what Katie thought about what form-factor she intended to dose. Maybe she was mixing up her Levemir vial/syringe with the Tresiba Flex-Pen. I canāt imagine that she would have used a u100 syringe to draw a dose out of a u200 Tresiba Flex-Pen.
As far as I understood thatās exactly what she was about to do.
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