Which drug is included in both Schedule I and Schedule II classifications?

The correct response indicates that no drugs are included in both Schedule I and Schedule II classifications. To understand this, it is critical to first recognize the key differences between the two schedules as defined by the Controlled Substances Act.

Schedule I drugs are classified as having a high potential for abuse, no currently accepted medical use in treatment in the United States, and a lack of accepted safety for use under medical supervision. Examples of Schedule I substances include marijuana, heroin, and MDMA (ecstasy), all of which are considered dangerous and largely illegal.

In contrast, Schedule II drugs also have a high potential for abuse but differ in that they have accepted medical uses in the United States, albeit with severe restrictions. Substances in Schedule II can include opioids like morphine and powerful stimulants such as amphetamines.

The clear delineation between the two schedules underscores that a drug cannot simultaneously fall into both categories; if a substance is listed as Schedule I, it cannot be recognized as having legitimate medical applications, which are a core characteristic of Schedule II substances.

Therefore, the assertion that no drugs are included in both schedule classifications holds true, as each classification serves to delineate the legal status and medical applicability of controlled substances distinctly.