The serotonin reuptake inhibitor Fluoxetine inhibits SARS-CoV-2 replication

Fluoxetine is better known by it's brand name, Prozac.

Anyway, though it's an interesting find, this isn't a trial in humans and, to forestall any jokes about it making people happy, the levels used (800 ng/mL) are far higher than what a quick Google says the common optimal blood serum levels are (100-300 ng/mL). It's a reasonable guess that it's not unsafe but would have higher likelihood of triggering known side effects that would be, shall we say, unpleasant.