Cannabinoids are fatty and oily chemicals that can connect to fat cells in our bodies. This is why it takes a long time to pass a drug test after using marijuana. The "high" feeling that people get when using marijuana depends on if they smoke a marijuana cigarette ("joint"), vape cannabis oils, or eat food with cannabis in it. Most people feel high for a few hours after using cannabis. Cannabinoids that bind to CB and CB receptors get into the bloodstream after being used and can change how the body functions for a short amount of time. 