Mental illness linked to increased risk of long-term opioid
A study has found that pre-existing depression or anxiety disorders and the use of psychoactive drugs can increase the risk leading to long-term use of opioid pain medications.

The findings showed that increases in rates of long-term opioid use ranged from 1.5 times for patients taking medications for attention-deficit/hyperactivity disorder, to about three times for those with previous substance use disorders other than opioids, to nearly nine times for those with previous opioid use disorders.

The study is published in the journal of PAIN.

Researchers from Indiana University Bloomington in the United States identified 10.3 million patients who filed insurance claims for opioid prescriptions between 2004 and 2013....