Lunesta
"I was prescribed lunesta a few years ago and took it for about 2 months, hated it and got off of it. Last night I was desperate to sleep, and I couldn't remember why I hated it, so I took another one. First of all, this was 17 hrs ago and my mouth still tastes like I sucked the coating off a bunch of ibuprofen. It makes it really hard to drink water because it exaggerates the taste.  Secondly, it makes me feel hungover and oppressively tired all day. Third, it let's me sleep only 6 or 7 hours despite feeling like I could sleep all day when I wake up. Is it the worst? No. It does work to that extent but the side effects are, if not medically serious, pretty annoying and uncomfortable."