Final answer:
Fentanyl patches must be applied to intact and clean skin and properly covered and disposed of while keeping them away from children and pets.
Step-by-step explanation:
Fentanyl patches must be applied to intact and clean skin, can only be covered with transparent film and medical tape adhesives, cannot be covered with plastic bags, must be removed before swimming, can be disposed of in the regular trash, and should be kept away from children and pets.
These instructions ensure the safe and effective use of fentanyl patches, as incorrect application or disposal could lead to inadequate pain control or accidental exposure to others, especially children and pets, which can be dangerous or even fatal.