There’s a new twist in the devastating opioid crisis. The US is said to be in the fourth wave of this epidemic, marked by the increased use of several substances at once, specifically stimulants and ...

Speedballing—the practice of combining a stimulant like cocaine or methamphetamine with an opioid such as heroin or fentanyl—has evolved from a niche subculture to a widespread public health crisis.

Speedballing – the practice of combining a stimulant like cocaine or methamphetamine with an opioid such as heroin or fentanyl – has evolved from a niche subculture to a widespread public health ...