Precautions when mixing types of insulin

When you are mixing types of insulin to be given in one syringe, follow these precautions.

  • If you are mixing NPH and short-acting regular insulin, you can use it right away or refrigerate it to be used later.
  • If you are mixing two different lente insulins, they will mix well.
  • Insulin glargine (Lantus) and detemir cannot be mixed with other types of insulin. It also cannot be given in a syringe that has been used to give another type of insulin.

Do not mix human- and animal-source insulins in the same syringe.



Author: Douglas Dana
Robin Parks, MS
Last Updated: August 15, 2007
Medical Review: Anne C. Poinier, MD - Internal Medicine
Caroline S. Rhoads, MD - Internal Medicine
Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology

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