From 2019 to 2020 more than 11,000 patients were treated in hospital emergency rooms for bicycle accidents while high on methamphetamine, marijuana or opioids. Some were also drunk or had been drinking alcohol.
The most common drugs found were methamphetamine (36%); marijuana (32%); and opioids (19%). Nearly a quarter of injured bikers had also been drinking alcohol, the study found.
Researchers speculate that some of the crash victims may have suffered fatal injuries.