What is the primary characteristic of Schedule I substances?

The primary characteristic of Schedule I substances is that they have no accepted medical use in the United States. This classification means that these substances are considered to have a high potential for abuse, and their use can lead to severe psychological or physical dependence. Because of these concerns, Schedule I drugs cannot be prescribed by healthcare providers and are strictly regulated under federal law.

This classification is crucial for understanding the guidelines and regulatory framework surrounding the use of controlled substances in medical practice. It helps prevent the misuse of substances that are deemed too dangerous for medical application. This is in contrast to other schedules that may allow for medical use, even if they carry some risks.