insomnia
"My father who has a neurological disorder was taking ambien and my family had 2 terrifying experiences. The first time my dad got up and fell several times and was completly unresponsive, he could not speak and we had thought that he had a stroke. Next time he took it I woke up in the middle of the night to a  huge bang finding him in the kitchen with a gash on his forehead. The even scarier thing is he never recalled any of these things. I'm not sure on the dosage but I don't recommend to anyone!"