Opioid overdose deaths involving more than one substance are more common among American teens and young adults than deaths caused by opioids alone, researchers report.
They also found that stimulants such as cocaine and crystal methamphetamine are the non-opioid substances most commonly involved in opioid overdose deaths in young people. Moreover, opioid overdose deaths involving stimula...
Cocaine is often cut with the anti-worming drug levamisole -- and the combination is linked to brain damage, Swiss researchers report.
"We can assume from our findings that it is not just cocaine that changes the brain, but that the adulterant levamisole has an additional harmful effect," said research leader Boris Quednow, from the University of Zurich.