https://en.wikipedia.org/wiki/Zuranolone "An orally active inhibitory pregnane neurosteroid, zuranolone acts as a positive allosteric modulator of the GABAA receptor." Interesting. I was expecting another SSRI or something similar.
“positive allosteric modulator of the GABAA receptor”, isn’t that a benzodiazepine? edit: nevermind i guess drugs are classified by their chemistry rather than their effects
However, since it's a neurosteroid most will probably not think of it as such. (It's name does begin with Z though... And end in -one like a steroid).
Anyways, it's licensed for 2 weeks only, side effects are drowsiness, sleepiness and cognitive impairment. You mustn't drive within 12 hours of a dose.
It's best effects are where the depression is associated with insomnia and anxiety.
It was compared to placebo not Alprazolam (Xanax) which has some antidepressant activity.