Final answer:
Fentanyl patches are classified as Schedule II controlled substances due to their high potential for abuse, despite having recognized medical uses.
Step-by-step explanation:
The correct classification for fentanyl patches according to the schedules of controlled substances is Schedule II. The United States Controlled Substances Act categorizes drugs into schedules based on their potential for abuse, with Schedule I being the most restricted. Schedule II substances, which includes fentanyl along with other substances like oxycodone, morphine, and methadone, are recognized for their medical uses but are tightly controlled due to their high potential for abuse and dependency. Medical assistants must be particularly careful when transcribing prescriptions for Schedule II medications due to the strict regulations regarding their distribution and documentation.