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.
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.