I used it to help me sleep. I used to have insomnia and I would feel sick the next day. Promethazine helped with the nausea if it didn't help me sleep. Knowing that I would have something to fight the nausea helped me sleep better. I never even considered it to manage moods.

Turns out, though, the reason I felt so nauseous after missing a night's sleep is because of how much I was drinking to try to get sleep. I haven't used it once since I stopped drinking.