Which drug class is not included in FDA part G's definition of controlled drugs?

The correct answer is cannabinoids. In the context of FDA regulations and controlled substances, cannabinoids, specifically those derived from cannabis, have historically been treated differently than substances like barbiturates and anabolic steroids. While the controlled substance classification is defined under the Controlled Substances Act, cannabinoids (particularly those that are naturally occurring in cannabis) were classified based on their potential for abuse and medical utility, which has evolved over time with changing laws and regulations regarding cannabis.

Barbiturates, anabolic steroids, and secobarbital are all well-defined within the framework of controlled substances due to their significant potential for abuse and addiction. Barbiturates are sedative-hypnotics that can be misused, anabolic steroids are synthetic derivatives of testosterone that can lead to serious health risks and have been associated with abuse in sports, and secobarbital is a specific barbiturate that is also tightly regulated.

Cannabinoids, while they can have effects on the CNS and potential for abuse, may not be included in certain definitions of controlled drugs depending on the specific context or regulation. For instance, in regions where cannabis has been legalized for medical or recreational use, cannabinoids may not be treated under the same stringent controlled substance regulations as the other classes. This differentiation