The fourth wave of the US overdose crisis: fentanyl and stimulants
New research published in the scientific journal Addiction has found that the proportion of US overdose deaths involving both fentanyl and stimulants has increased more than 50-fold since 2010, from 0.6% (235 deaths) in 2010 to 32.3% (34,429 deaths) in 2021. By 2021, stimulants (such as cocaine and methamphetamine) had become the most common drug class found in fentanyl-involved overdoses in every US state. This rise in fentanyl/stimulant fatalities constitutes the ‘fourth wave’ in the US’s ...














