Cannabis, also known as marijuana among other names, is a psychoactive drug from the Cannabis plant. Native to Central and South Asia, the cannabis plant has been used as a drug for both recreational and entheogenic purposes and in various traditional medicines for centuries

The main psychoactive ingredient, THC, stimulates the part of your brain that responds to pleasure, like food and sex. That unleashes a chemical called dopamine, which gives you a euphoric, relaxed feeling.