Overdosing on heroin comes from inconsistent purity in black market heroin. Addicts have no reliable way to determine how much they are injecting. Heroin addic

Overdosing on heroin comes from inconsistent purity in black market heroin. Addicts have no reliable way to determine how much they are injecting. Heroin addicts get their start from prescription drugs. When the doctors cut them off, or it gets too expensive, they turn to heroin.