Which of the following is an example of a Schedule II drug?

Cocaine is classified as a Schedule II drug due to its high potential for abuse, which can lead to severe psychological or physical dependence. Schedule II substances are recognized for having legitimate medical uses, albeit with strict regulatory controls. In the medical field, cocaine can be used in specific situations such as a local anesthetic for certain types of surgery or procedures, especially in ophthalmology.

In contrast, acetaminophen, ibuprofen, and diphenhydramine fall under different classifications. Acetaminophen and ibuprofen are commonly used over-the-counter medications that do not have a high potential for abuse and are therefore not classified as controlled substances. Diphenhydramine, an antihistamine, is also available over-the-counter and does not meet the criteria for a Schedule II classification, as it does not have significant abuse potential. This distinction is crucial for understanding the regulations governing controlled substances and their medical applications.