Brexanolone is administered as an iv infusion over a 60 hour period (in a hospital setting).
As Pam Belluck of the NYT had noted in 2019, making an orally available form was the clear next step.
"A pill made with a similar molecule, which would be much more accessible and easier for patients, is showing promise in its clinical trials and would be submitted for approval in a couple of years if the results are good, according to Sage."
https://www.nytimes.com/2019/03/19/health/postpartum-depression-drug.html