Nitazenen

Nitazenes are a chemically defined class of substances derived from the parent compound nitazene. Nitazenes were developed in the second half of the 1950s by the Swiss company Ciba AG as pain-relieving agents. They are important as centrally active, selective μ-opioid receptor agonists. The high potency of fentanyl is matched by a few nitazenes and surpassed by etonitazene and isotonitazene. Nitazenes were never included in the pharmacopoeia of human or veterinary medicine and have not been appr