Back to Ask the Diabetes Team Ask the Diabetes Team

From Hartland, Maine, USA:

How long can you let mixed NPH and Regular sit in the syringe before it is safe to give the injection? Do you have to give the injection right away or can you wait to give the injection?


This theme has been explored a number of times in studies that are now mostly over ten years old. The answer is that when Regular insulin is mixed with Lente insulin there seems to be a clear impairment of the effect of the Regular. With respect to Regular and NPH, when the pattern of blood glucose is compared between separately injected and premixed Regular and NPH insulins there seems to be no difference in effect for up to as long as 48 hours.

Just the same, it is normal practise to give Regular and NPH insulin injections immediately after mixing.


Original posting 14 Aug 2003
Posted to Insulin


  Back to Ask the Diabetes Team Return to the Top of This Page

Last Updated: Tuesday April 06, 2010 15:09:48
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.

This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents. Our mission is to provide education and support to families living with type 1 diabetes.
By using this site, you agree to our Terms of Use, Legal Notice, and Privacy Policy.
© Children with Diabetes, Inc. 1995-2018. Comments and Feedback.