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 smoked, usually feel its peak effects after 10 to 15 minutes. NIDA researchers have confirmed that all forms of heroin administration are addictive. (more…)
