Here it's reasonable to differentiate between natural opioids, semi-synthetic opioids, and fully synthetic opioids. It's not a perfect measure, but the degree

Here it's reasonable to differentiate between natural opioids, semi-synthetic opioids, and fully synthetic opioids. It's not a perfect measure, but the degree of potency tends to vary with the category and the fully synthetic opioids do not rely upon poppies for precursors.