Final answer:
Stop the infusion of the Dextrose IV bag immediately if you find a white fluffy substance, dispose of the contaminated bag, and obtain a new one; consult a pharmacist for further instructions.
Step-by-step explanation:
If you find a white fluffy substance in a Dextrose IV bag, the first step you should take is to stop the infusion immediately. This white fluffy substance could indicate contamination or a reaction within the IV fluid, which could be harmful if infused into a patient. After stopping the infusion, you should dispose of the bag properly and get a new one to ensure patient safety. It is also essential to consult a pharmacist or a healthcare professional for guidance and to report the incident to prevent future occurrences.