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Perspective from John F. Kelly, PhD, ABPP
December 13, 2018
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CDC: Most overdose deaths involved fentanyl in 2016

Perspective from John F. Kelly, PhD, ABPP
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A report from the CDC found that the most frequently mentioned drugs relating to overdose death in the U.S. from 2011 to 2016 varied over time and by intent of death, with oxycodone ranking first in 2011, heroin ranking first from 2012 to 2015 and fentanyl ranking first in 2016.

From 2013 through 2016, the rate of drug overdose deaths involving fentanyl and fentanyl analogs doubled each year, according to the CDC.

“Many of the studies looking at the drug overdose problem in the United States provide information on broad categories of drugs,” Holly Hedegaard, MD, MSPH, injury epidemiologist at the CDC’s National Center for Health Statistics, told Healio Psychiatry. “In this report, we were able to look at specific drugs—such as fentanyl, oxycodone and methamphetamine—using detailed information provided on death certificates. Knowing the patterns and changes in the specific drugs involved in drug overdose deaths can help inform prevention efforts.”

The investigators identified the specific drugs involved most frequently in drug overdose deaths in the United States using record-level data from the 2011 to 2016 National Vital Statistics System–Mortality files linked to electronic files containing literal text information from death certificates. They calculated descriptive statistics for drug overdose deaths involving the 10 most frequently mentioned drugs and measured deaths relating to more than one drug in all relevant drug categories.

Analysis revealed that the number of drug overdose deaths per year rose 54% in the U.S., from 41,340 deaths in 2011 to 63,632 deaths in 2016. Although the ranking changed from year to year, the top 10 drugs involved in overdose deaths were consistent from 2011 through 2016. The top 10 drugs belonged to three drug classes: opioids, benzodiazepines and stimulants.

 
In the U.S., the number of drug overdose deaths per year rose 54% between 2011 and 2016.
Source: Adobe Stock

Of the drug overdose deaths that involved at least one specific drug, the data showed that the 10 most frequently mentioned drugs over the 6-year period included fentanyl, heroin, hydrocodone, methadone, morphine, oxycodone, alprazolam, diazepam, cocaine and methamphetamine.

In 2016, 29% of all drug overdose deaths involved fentanyl, making it the most frequently involved drug in 2016. Heroin ranked first from 2012 to 2015, and oxycodone ranked first in 2011, the CDC reported. Cocaine consistently ranked second or third over the study period.

The report also showed that:

  • The age-adjusted rate of drug overdose deaths involving heroin increased from 11% of all drug overdose deaths in 2011 to 25% in 2016.
  • The number of drug overdose deaths involving methamphetamine grew 3.6-fold, from 1,887 deaths in 2011 to 6,762 deaths in 2016.
  • The number of drug overdose deaths involving methadone dropped from 4,545 deaths in 2011 to 3,493 deaths in 2016.

Hedegaard and colleagues found that many drug overdose deaths involved multiple drugs in 2016 and varied by the intent of the drug overdose death.

“An important finding in the report is that many drug overdose deaths involve multiple drugs,” Hedegaard told Healio Psychiatry. “Awareness of the drug combinations that are frequently found in drug overdose deaths may be useful for clinicians.”

In 2016, the drugs most often mentioned in unintentional drug overdose deaths included fentanyl, heroin and cocaine and those most often mentioned in suicide deaths included oxycodone, diphenhydramine, hydrocodone and alprazolam. The data also revealed that about 40% of overdose deaths involving cocaine also mentioned fentanyl and 32% of drug overdose deaths involving fentanyl also mentioned heroin.

“Literal text analysis can be used to extract key information from death certificates to improve national monitoring of drug overdose deaths,” the researchers wrote in the full report.

“With slight modification, the methods used in this report can be used to identify deaths involving newly approved prescription drugs and new substances of abuse,” they continued. “Periodic updating of search terms and text search capabilities is essential for the ongoing surveillance and monitoring of emerging trends in drug overdose deaths using literal text analysis. In addition, this report highlights the critical importance of reporting the specific drugs involved in drug overdose deaths in the literal text on death certificates.” – by Savannah Demko

References:

Hedegaard H, et al. Drugs most frequently involved in drug overdose deaths: United States, 2011–2016. https://www.cdc.gov/nchs/data/nvsr/nvsr67/nvsr67_09-508.pdf. Accessed on Dec. 12, 2018.

Disclosure: Healio Psychiatry was unable to confirm any relevant financial disclosures at the time of publication.