Chinese fentanyl is way worse than (clean) heroin ever was, too. Doses active in the microgram range with extremely narrow weight/tolerance dose-response curves. It's dangerous enough even with professional volumetric dosing, let alone cut into street dope. Fentanyl shouldn't even be used in medical settings. Look at the samples sent to drugsdata.org. Most drugs are sold as advertised, until you look at hard shit like meth, coke, and heroin. They are chock full of nasty crap and strange, novel RCs with little to nothing known about them. The 00's opiate crisis was bad, it was nothing compared to how bad it is now. The agenda doesn't want a spotlight on it anymore.