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Dr. Thomas, MD
Dr. Thomas, MD, Board Certified Physician
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Experience:  Internal Medicine--practice all of internal medicine, all ages, family, also Integrative, CAM, etc
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I took an injection of 36 units of Humalog fast acting insulin

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I took an injection of 36 units of Humalog fast acting insulin instead of
36 units of Lantus long acting insulin about 50 minutes ago.
I have eaten 2 Musketeer candy bars and I have tested about every 5 minutes since then.
I was 227 at the beginning, and have maintained at 219 for the past 15 minutes.
How long does fast acting insulin work?
At what level and for how long should I be before I can relax and go to bed?
Now at 174. 1 hour after the injection.

Thanks,
Doris
Hello

I am Dr. Thomas, double board certified physician with over 20 years of clinical experience. I will help you with your question and any follow up questions you have.

This insulin is peaking at this point -1 to 2 hours].
It will dissipate over the next 2 to 4 hours. [6 hours total].

In fact I am playing safe here as humalog is actually, on average, even a bit faster in onset of action and wearing off.

So I am giving you a bit of an over kill parameter to err on the side of safety.

After that point you should be safe.

Of course this depends on what you usually take.
I would not take the long acting at this point.
I would monitor for a full six hours.

If you see rapid dropping go to the ER.

Use reply to let me know if you have further questions.
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Customer: replied 3 years ago.

So then, I will need to stay up and keep checking for at least another hour. At time it should have peaked and be on the descending side. Since I will be asleep and not eating it should then end its action in 2-4 hours.


I usually take 6 units before meals and 2 units for each 50 or part there of over 150. i.e. if I test at 178, then I take 6 units for the meal and 2 units for the part over 150.


 


 

It was a whopping dose.
I am telling you that you should monitor yourself for at least 4 hours since taking the dose, and preferably 6, to be completely safe.


Use reply to let me know if you have further questions.
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Customer: replied 3 years ago.

So I might as well find an interesting late night movie on the TV and pop some corn!


Oh well, at least I can get through this thing. I will be up for the next 4 hours.


 


Thank you so much. You can bet I'll take my time and pay more attention tomorrow night. I don't want to do this again!


 


Thank you, Doctor. Anything else?


 

Just be cautious and if you start dropping rapidly go get help.
If not you should be OK.
Good luck.

Use reply to let me know if you have further questions.
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Customer: replied 3 years ago.


ok.


 


Have a good night!


 


I'll keep testing. Its gone back up to 198 now. I guess it will wobble around for a while before it steadily goes down.


 


I'll stay awake and keep working on it. I surely don't want to wake up dead. (lame joke)


 


Thanks again.

AOK
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