What schedule is methamphetamine classified under when prescribed for a medical use?

Methamphetamine, when prescribed for a legitimate medical use, is classified as a Schedule II controlled substance. This classification is due to its high potential for abuse, which can lead to severe psychological or physical dependence. Schedule II drugs are also substances that have accepted medical uses in treatment in the United States, but they are tightly regulated.

In the case of methamphetamine, the only formulation that is approved by the FDA for medical use is a specific formulation known as Desoxyn, which is used in the treatment of obesity and attention deficit hyperactivity disorder (ADHD) when other treatments have not been effective. As a Schedule II drug, it is subject to stringent restrictions in terms of prescribing and dispensing, reflecting the careful balance between its medical utility and the risks associated with misuse.

The other classifications mentioned in the question do not apply to methamphetamine when it is used medically. Schedule III and IV substances have lower potential for abuse, and Schedule I substances are not accepted for medical use in the U.S. Thus, understanding the distinction and regulations surrounding Schedule II drugs is crucial for compliance in pharmaceutical practice.