Metonitazene is an analgesic compound related to etonitazene,^[2][3] which was first reported in 1957,^[4] and has been shown to have approximately 1000 times the potency of morphine by central routes of administration,^[5] but if used orally it has been shown to have approximately 10 times the potency of morphine.^[6

If accidentally swallowed, consult a doctor immediately. For research purposes only!