Accidental drug overdose的用法和样例：
- Ledger was found dead in his New York apartment on January 22nd after suffering an accidental drug overdose.
- He prefers to die of drug overdose, no pain.
- In 2004, nearly 20,000 people died from accidental drug poisonings.
- His son is following in the day died, the cause of death was drug overdose of heroin.