week. cnn s rosa flores has more for you. reporter: it sells under harmless sounding names like theraflu and bud ice but the white powder inside these one-inch packets is deadly, linked to killing at least 22 people in western pennsylvania in the past week. i just finished filling the heroin. i walked into the bathroom and went on to the ground. i overdosed on it and almost died. it took his friend dying to scare him back into rehab at the greenbrier center near pittsburgh. you know you can do, 7, 8, 9 bags. with theraflu and made me feel i m not invincible nirm anymore. reporter: the first re, afrom heroin addicts? rush to find the good stuff. when somebody knows there are