Using parts of the cannabis plant (like CBD oil) helps study specific actions of that ingredient, but when the whole plant is used there is what is called an entourage effect, where the parts work together to have more effect. The FDA have also approved medications containing synthetic THC cannabinoids called dronabinol (Marinol) and nabilone (Cesamet). Everyone has a cell-signaling system called the endocannabinoid system (ECS). Opioids are powerful medications that relieve pain by acting…