How Is Heroin Used?

Heroin is usually injected, sniffed / snorted, or smoked. Typically, the addict may inject up to four times a day. Intravenous injection provides the greatest intensity and causes more rapid onset of euphoria (7 to 8 seconds),
while intramuscular injection produces a relatively slow onset of euphoria (5 to 8 minutes). When heroin is sniffed or [...]