Final answer:
A DEA Form 222, used for ordering Schedule II controlled substances, can list a maximum of 10 different items, ensuring proper control and prevention of abuse.
Step-by-step explanation:
The question pertains to the DEA Form 222, which is used for the ordering of Schedule II controlled substances in the United States. According to the Controlled Substances Act, a single DEA Form 222 can include up to 10 different items. It is important for healthcare facilities and pharmacies to comply with this regulation when ordering such medications, as it helps ensure proper tracking and control of these substances to prevent abuse and diversion.