insomnia
"I'm a chronic insomniac and have tried just about every medicine and remedy available. Lunesta 3mg works the best for me although after 10 days I no longer sleep through the night. I wake up after 3 or 4 hours but I can usually fall back asleep for another 3 hours which is better than not sleeping at all.  The only time I've noticed the bad taste is when I cut a pill in half.  Don't do it!"