Tetrahydrocannabinol
Cannabis works by sticking to special receptors in the brain and body, which is known as the endocannabinoid system or ECS. There are 2 kinds of receptors, CB1 and CB2. Over time, a person will need more THC to feel the same effects as before. This is known as tolerance. A person may also experience withdrawal, which can be uncomfortable and is a result of stopping THC use quickly after using it for some time. People usually do not get addicted to using THC.