While the preliminary autopsy of Heath Ledger has been ruled inconclusive by the New York City medical examiner, more tests are needed and will be performed over the next 10 days, said said Ellen Borakove, a spokeswoman for the medical examiner.

Heath had been upfront about his lack of success using Ambien, something he mentioned in an interview with the New York Times last November, when he said the pills "failed to work." He took two and, according to the story, "fell into a stupor, only to wake up an hour later, his mind still racing."

According to the first reports bottles of Ambien and two other prescription antidepressants found close by. The death cause could easily be mixing prescription and over the counter drugs. People just don't realize how dangerous this could be when they take those pills. Doesn't this story remind you the one of Anna Nicole Smith? This is extremely sad.