insomnia
"I love this medicine. I have delayed sleep-phase disorder and I've been using Ambien for the last five years. I learned pretty quick that I have to take it and go lie down; the first time I took some I thought "Well, I'll go have a quick bath before I go to bed." My husband says I wandered in an hour later talking about how the bathtub faucet changed into a raven's head and we (the faucet and I, that is) had a very long and profound conversation about the Harry Potter novels and the social implications thereof."