“The fentanyl-heroin cocktail is nothing new; the combination has been available on the street since the 1970s. Fentanyl abuse kills dozens of people annually, often because users apparently misjudge the strength of a dose. We do appear to be experiencing a surge in fentanyl-related deaths right now—22 people are believed to have died from these contaminated heroin supplies in six Pennsylvania counties alone.”*

Heroin laced with Fentanyl is being linked to dozens of deaths on the east coast. But what’s in it that’s killing people faster than ever? Cenk Uygur and Ana Kasparian break it down.

*Read more from Slate: http://www.slate.com/articles/health_and_science/explainer/2014/02/bad_heroin_did_a_mixture_of_heroin_and_fentanyl_kill_philip_seymour_hoffman.html