(KFF Health News) – The mix of stimulants such as cocaine and methamphetamines with fentanyl — a synthetic opioid 50 times as powerful as heroin — is driving what experts call the opioid epidemic’s “fourth wave.” The mixture of stimulants and fentanyl presents powerful challenges to efforts to reduce overdoses because many users of stimulants don’t know they are at risk of ingesting opioids, so they don’t take overdose precautions.

The only way to know whether cocaine or other stimulants contain fentanyl is to use drug-checking tools such as fentanyl test strips — a best practice for what’s known as “harm reduction,” now embraced by federal health officials in combating drug overdose deaths. (Read More)