Anyone tried these?

Just got these for my long flight back tonight

I think it says take two. Anyone got any experience if they work? I don’t want to be awake for 18 hours, my flight out is at 2am!

Just got these for my long flight back tonight

I think it says take two. Anyone got any experience if they work? I don’t want to be awake for 18 hours, my flight out is at 2am!