Fentanyl mixed with cocaine or meth is driving the ‘4th wave’ of the overdose crisis

A new study finds a 50-fold growth in deaths from combined use of stimulants and opioids. The toxic and contaminated drug supply is to blame.

(Image credit: Mark Lennihan/AP)

​A new study finds a 50-fold growth in deaths from combined use of stimulants and opioids. The toxic and contaminated drug supply is to blame.