After gently rotating a vial of isophane insulin NPH (Humulin N), the nurse notes that the drug has a cloudy appearance. What step does the nurse take before administering it to a patient?
a. Shaking the vial for 30 seconds before using it.
b. Placing the vial in warm water to clarify the drug.
c. Discarding the current vial and opening a new one.
d. Rechecking the dosage and drawing it into the syringe.
D
Isophane insulin NPH is normally cloudy and does not clarify. If no particles are present, it is ready to use after gently rotating the vial to mix the drug. Insulin vials should never be shaken because this creates bubbles that interfere with obtaining the correct dosage.
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