insomnia
"I used to take lunesta and it worked fine but I went back to ambien. Then I stopped both and my insomnia is back a year later. Personal issues. I decided to try lunesta because ambien would make me so tired I couldn't wake up in the morning. With lunesta I can wake up before my alarm clock. That's exactly what I needed. I haven't tried taking it for more than 2 months. Hopefully the effect doesn't wear off. If so I'll have to just go back to Benadryl."