Wiktionary
clonitazene
n. (context pharmaceutical drug English) A particular narcotic painkiller.
Wikipedia
Clonitazene
Clonitazene is an opioid analgesic of approximately three times the potency of morphine. It is related to etonitazene, an opioid of significantly higher potency. Clonitazene is not currently marketed. It is a controlled substance; in the United States it is a Schedule I Narcotic controlled substance with a DEA ACSCN of 9612 and an annual manufacturing quota of zero.