Phenazolam, (Clobromazolam, DM-II-90, BRN 4550445) is a benzodiazepine derivative which acts as a potent sedative and hypnotic drug.
It was first invented in the early 1980s, but was never developed for medical use.
It has been sold over the internet as a designer drug, first being identified in seized samples by a laboratory in Sweden in March 2016.