RN Exam Practice
Pharmacological and Parenteral TherapiesQuestion 605 of 2368

The nurse is mixing regular insulin and NPH insulin in one syringe. Which step is correct?

  1. Draw up the NPH insulin first, then add the regular insulin
  2. Draw up each insulin separately and combine them in a cup
  3. Never mix the two insulins under any circumstance
  4. Draw up the regular insulin first, then add the NPH insulin
Show answer

Correct answer: Draw up the regular insulin first, then add the NPH insulin

NPH may be mixed with rapid- or short-acting insulins, but those insulins should be drawn into the syringe before the NPH.

Source: Nursing Pharmacology, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Endocrine System: Intermediate-Acting Insulin. Licensed under CC BY 4.0.

Practice the topic "Pharmacological and Parenteral Therapies"

Questions last reviewed: 18 October 2026