Which of the following statements is true regarding controlled substances?

The statement that controlled substances can have legitimate medical uses is true because many controlled substances are specifically regulated due to their potential for abuse or dependency. However, they are also essential in medical practice. Substances such as opioids for pain management, stimulants for attention deficit disorders, and certain anxiolytics are classified as controlled substances because they serve important therapeutic purposes while being monitored for safety and compliance.

This regulation helps ensure that while these substances are available for legitimate medical needs, their distribution and use are controlled to prevent misuse and protect public health. Therefore, the existence of rules governing their prescription and distribution underscores their potential benefit when used responsibly in medical contexts.