Answer:
Explanation:Methadone and meperidine are Schedule II controlled substances in the United States, while methylphenidate is a Schedule II or III controlled substance depending on the formulation and the intended use.
Schedule II drugs have a high potential for abuse and dependence, and their use is strictly regulated by the government. These drugs can only be obtained with a prescription from a licensed healthcare provider, and there are limits on the quantity that can be prescribed and dispensed.