Which of the following substances is categorized as a cannabinoid?

Cannabinoids are a class of compounds that interact with the cannabinoid receptors in the body, primarily found in the endocannabinoid system. THC, or tetrahydrocannabinol, is the primary psychoactive component of cannabis. It has various effects including euphoria, relaxation, and altered perception, making it distinct in its classification as a cannabinoid. THC is known for its role in the medicinal and recreational use of marijuana.

The other substances listed do not belong to the cannabinoid category. PCP (phencyclidine) is classified as a dissociative anesthetic, while MDMA (3,4-methylenedioxymethamphetamine), commonly known as ecstasy, falls under the category of empathogens. Amphetamines are a group of stimulant drugs that increase energy and alertness. Each of these substances has a different mechanism of action and effects on the human body compared to cannabinoids, highlighting THC as the only cannabinoid in this context.