Tetrahydrocannabinol, or THC, is the main psychoactive compound in marijuana. It's what makes people feel high. Short for tetrahydrocannabinol, THC is the component of cannabis responsible for the psychoactive effects of the plant. When you consume cannabis, it's because of THC that you experience a euphoric and relaxed feeling. THC stimulates the part of the brain that responds to pleasure, such as food and sex.
This releases a chemical called dopamine, which is a neurotransmitter that plays an important role in mood and pleasure. By causing a higher-than-normal release of dopamine, THC causes people to feel euphoric. THC also interferes with the way information is processed in the hippocampus, which is part of the brain responsible for forming new memories. According to the National Institute on Drug Abuse (NIDA), THC activates the brain's reward system by signaling the release of dopamine. CB1 receptors in the brain and nervous system modulate movement, memory, cognition, sensory perceptions, and even the perception of time. According to the NIDA, tetrahydrocannabinol “overactivates functions normally regulated by the ECS, such as mood, appetite, cognition and perception. THC is often given when smoking marijuana, but it can also be found as an ingredient in capsules, edibles and oils.
It's important to note that THC can have different effects on different people. Some may experience a feeling of relaxation while others may experience anxiety or paranoia.