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Type 1 Why can’t you inject until 4 hours?

Discussion in 'Ask A Question' started by Alex_B, Dec 20, 2019.

  1. Alex_B

    Alex_B Type 1 · Well-Known Member

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    I don’t understand which I should, having diabetes for 3 years. But why can’t you? What about correction doses? I’m mostly running high but with having the Freestyle Libre I’m checking constantly and need to have correction doses but my nurse told me I can’t do it for 4 hours? Help?
  2. Emily95

    Emily95 Type 1 · Well-Known Member

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    Because that’s typically how long it takes fast acting insulin (like novorapid) to be out of your system. I don’t ever inject if it hasn’t been 4 hours since my last novorapid because I don’t like stacking doses, stacking tends to lead to lows then highs then lows then highs. I find it’s best to give it the 4 hours to work.
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  3. searley

    searley Type 1 · Moderator
    Staff Member

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    I inject as little as 2 hours..

    If I have under estimated my food intake and my bg is the same or higher after 2 hours I will have more

    But as said above it can last in your system for upto 4 hours so if you dont allow for this you could end up having a hypo

    Another thing I was told was never inject without food.. but I do if needed
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