Trends analysis of drug poisoning deaths has helped explain a national epidemic of overdose deaths in the USA that began in the 1990s, concludes Leonard Paulozzi and colleagues at the Centers for Disease Control and Prevention in Atlanta, USA.
The contribution of prescription pain killers to the epidemic has only become clear recently. This research is published this week in the journal, Pharmacoepidemiology and Drug Safety.
Drugs called "opioids" are frequently prescribed to relieve pain, but if abused they can kill. Over the past 15 years, sales of opioid pain killers, including oxycodone, hydrocodone, methadone and fentanyl, have increased, and deaths from these drugs have increased in parallel.
In 2002, over 16,000 people died in the USA as a result of drug overdoses, with most deaths related to opioids, heroin, and cocaine. Opioids surpassed both cocaine and heroin in extent of involvement in these drug overdoses between 1999 and 2002.
The situation appears to be accelerating. Between 1979 and 1990 the rate of deaths attributed to unintentional drug poisoning increased by an average of 5.3% each year. Between 1990 and 2002, the rate increased by 18.1% per year. The contribution played by opioids is also increasing. Between 1999 and 2002 the number of overdose death certificates that mention poisoning by opioid pain killers went up by 91.2%. While the pain killer category showed the greatest increase, death certificates pointing a finger of blame at heroin and cocaine also increased by 12.4% and 22.8% respectively.