By Pat Anson, PNN Editor

Abruptly stopping long-term treatment with benzodiazepines nearly doubles the risk of a patient dying within a year, according to a large new study.

Benzodiazepines such as Valium and Xanax have long been used to treat anxiety, insomnia and seizures, but their coprescribing with opioids is controversial because both drugs cause respiratory depression, increasing the risk of an overdose.

In 2016, the CDC warned doctors to avoid coprescribing opioids and benzodiazepines “whenever possible.” That same year, the FDA warned that taking the drugs concurrently has serious risks, including “profound sedation, respiratory depression, coma and death.”

Those warnings led many prescribers to abruptly take their patients off benzodiazepines, which many used safely for years. Some patients took opioids and benzodiazepines with a muscle relaxant, a combination known as the “Holy Trinity.”  

Researchers at the University of Michigan analyzed the insurance claims of over 350,000 adults prescribed benzodiazepines long-term from 2013 to 2019, expecting to find the FDA and CDC warnings validated. To their surprise, the risk of death from suicide, accidents and other causes rose for patients in the 12 months after benzodiazepines were discontinued.

“These results were unexpected,” researchers reported in JAMA Network Open. “Given the increased OD (overdose) risk and mortality associated with benzodiazepine prescribing, particularly when coprescribed with opioids, we anticipated that discontinuing benzodiazepine prescriptions would be associated with a lower mortality risk.

“However, for every outcome examined in this analysis, discontinuation was associated with some degree of increased risk — at odds with the assumption underlying ongoing policy efforts that reducing benzodiazepine prescribing to long-term users will decrease harms.”

Researchers found that patients on opioids who stopped taking benzodiazepines had a 6.3% risk of dying over the next year, compared to 3.9% of those who continued taking both drugs. Patients who were discontinued also had a slightly higher risk of a nonfatal overdose, suicidal thoughts, and emergency department visits.

Risk of Death for Opioid Patients Taken Off Benzodiazepines

"I think it is important to revisit the assumption that tapering stable long-term users should be the default and instead, perhaps, focus on those with clearly elevated risk of harms," lead author Donovan Maust, MD, a geriatric psychiatrist at UM Health, told MedPage Today.

Maust and his colleagues say patients discontinued from benzodiazepines could be suffering the effects of withdrawal or may be turning to other substances such as cannabis or alcohol. Given the risks involved, they urge prescribers to be “judicious” when prescribing benzodiazepines for the first time and to carefully limit their long-term use.