Carfentanil Is an especially powerful fentanyl-by-product originally circulated from the mid-1980s being a typical anesthetic for giant animals which include elephants. At this time, carfentanil continue to sees medical and scientific use as a radiotracer for positron emission tomography imaging, linked to its significant affinity for MORs in Mind tissue https://chemicalglobe.com/product-tag/protonitazene-for-sale/