insomnia
"I had a bad experience each time I tried it.  I have been on Ambien for many years, but my Dr wanted to try something else. The Rozerem made me extremely anxious, and did the opposite of what I needed it for! My heart beat fast, and I had a feeling of nervousness and anxiousness. I tried it 4 times, and it was the same all 4. Maybe I'm allergic."