DOT Certification Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Medicinal marijuana is not permitted for commercial drivers primarily due to federal regulations that govern the use of controlled substances. The Department of Transportation (DOT) adheres to strict rules regarding drug use among commercial drivers, and cannabis, regardless of its medicinal properties or state laws, is classified as a Schedule I controlled substance under federal law. This means that it is illegal for commercial drivers to use marijuana, even if they have a prescription for medical purposes.

While some states have legalized medicinal marijuana and may allow it for various uses, the federal regulations do not provide any exemptions for commercial drivers. The DOT emphasizes safety on the roads, and the impairment that may result from marijuana use could lead to serious safety concerns. Therefore, the overarching conclusion is that regardless of state laws or prescriptions, commercial drivers are prohibited from using medicinal marijuana.