What is THC?
THC, also called tetrahydrocannabinol, is the compound in cannabis that is psychoactive and gives you the feeling of being high. However, THC's chemical make-up, C₂₁H₃₀O₂, is very similar to its counterpart, CBD, which actually combats the effects of THC.
Still, THC mimics the natural chemical anandamide (which is produced in the brain) in structure, altering the function in communication. So, instead of normal brain communication via neurons, the THC compound attaches to the neurons and changes the process.
According to the National Institute on Drug Abuse (NIDA), THC affects things like thinking, memory, pleasure, movements, concentration, coordination, and sensory and time perception. For these reasons, doing things like operating heavy machinery or driving while under the influence of the drug may be dangerous.