Is the same not true for dexamethasone[1], which was the first successful finding from the RECOVERY trial[2]? That's how I've repeatedly seen it described[3] (FWIW, I was treated with dexamethasone for Covid-19 in October 2020).
[1] https://en.wikipedia.org/wiki/Dexamethasone
[2] https://en.wikipedia.org/wiki/RECOVERY_Trial
[3] "A cheap and widely available drug can help save the lives[...]" https://www.bbc.co.uk/news/health-53061281