Medical marijuana facts
Marijuana, or cannabis, is the most commonly used illicit drug in the world. Get the facts about how marijuana affects your brain and body. Cannabis, also known as marijuana among other names, is a psychoactive drug from the Cannabis plant used for medical or recreational purposes.
The main psychoactive part of cannabis is tetrahydrocannabinol, one of the 483 known compounds in the plant, including at least 65 other cannabinoids.