THC is the most well-known and well-studied chemical compound in marijuana. THC works by interacting with the body's endocannabinoid system. It is responsible for the psychoactive effects of the plant, causing feelings of euphoria, time distortion, and changes in perception.

THC offers medical benefits for many conditions, including Alzheimer's, multiple sclerosis, pain, and sleep apnea.

THC has a number of side effects, including anxiety, dizziness, and dry mouth. There are also some risks of long-term use, such as lung problems (bronchitis), heart risks, cognitive impairments, and addiction.

THC is the compound most often associated with marijuana. It is one of the most prevalent cannabinoids found in the plant sometimes occurring at concentrations up to 30%.

THC is the psychoactive component in marijuana that contributes to the "high". It binds to CB1 receptors in the brain. The marijuana high causes feelings of euphoria, relaxation, increased appetite, increased sensory perception, time distortion and increased socialization.

Apart from being psychoactive, THC has many other effects. One of its most well-known benefits is its ability to reduce nausea and vomiting.

THC can also help to reduce pain in certain disorders. Marinol and Cesamet are two prescription medications that contain THC.

Side effects of THC include an increased heart rate, bloodshot eyes, dry mouth, dizziness, sedation, as well as cognitive and motor impairments.

Cognitive impairments from THC may include decreased short-term memory and concentration while under the influence.

Other more severe effects from THC include panic attacks, hallucinations, and vomiting. These effects are uncommon in experienced users, and are more likely to occur when excessive amounts are consumed.

Excerpt from https://www.leafscience.com/2017/10/25/what-are-cannabinoids/