Ephedrine meth was a euphoric, social drug, a party drug—the kind Eric Barrera remembered from his first years of using. P2P meth, made with toxic chemicals, was more sinister. As unprecedented amounts of it found their way to every part of the United States, so, too, did the mental derangement Dillon had seen in his customers and the violent delusions Eric Barrera had felt. This meth quickly drove users to symptoms of schizophrenia—violent paranoia, agonizing hallucinations, and fantastical conspiracy theories—as well as horrible dental infections.