insomnia
"I was prescribed Olanzpine for insomnia and it worked like a charm, was on 2.5 mg sometimes 5mg and would always get 8 - 10 hour sleep without waking, also no severe hangover effect the following morning. Downside is it significantly increases your appetite so you need to be cautious of subsequent weight gain thus I would only recommend olanzapine if you're suffering from a severe bout of insomnia."