Poisoning in the United States: Fact Sheet http://www.cdc.gov/HomeandRecreationalSafety/Poisoning/poisoning-factsheet.htm
In 2004, 95% of unintentional and undetermined poisoning deaths were caused by drugs.
In 2004, 75% of poisoning suicides were caused by drugs—both legal and illegal. The most commonly used drugs identified in drug-related suicides were psychoactive drugs, such as sedatives and antidepressants, followed by opiates and prescription pain medications.
Most (93%) nonfatal, poison-related suicide attempts involved pharmaceuticals. Among the 132,582 drug-related suicide attempts in the United States in 2005, sedatives and hypnotics, pain medications, and antidepressants were the most common drugs taken. Among pain medications, opioids were the most widely used, while benzodiazepines were the most common sedatives.
In 2000, poisonings led to $26 billion in medical expenses and made up 6% of the economic costs of all injuries in the United States.
Males accounted for 75% of the total costs of poisoning injuries ($19 billion).
Females accounted for 25% of the total costs of poisoning injuries (almost $7 billion) (Finkelstein et al. 2006).