Four people have been hospitalised across Sydney with severe opioid overdose caused by nitazenes.
People who thought they were taking etazene were taking a more potent nitazene (protonitazepyne*) and a potent novel benzodiazepine (bromazolam).
Another potent nitazene (protonitazene) is suspected to have been present in either cocaine or ketamine.
* also known as N-pyrrolidino protonitazene
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