Heroin
Heroin is a highly addictive, semi-synthetic opioid derived from morphine. Once a major driver of the opioid epidemic, heroin is now frequently contaminated with fentanyl, making it even more dangerous.
Quick Facts
What Is Heroin?
Heroin is a semi-synthetic opioid processed from morphine, which is extracted from opium poppy plants. It typically appears as a white or brown powder, or as a sticky black substance known as "black tar heroin." Heroin can be injected, snorted, or smoked.
How Heroin Affects the Body
Heroin rapidly crosses the blood-brain barrier and binds to opioid receptors, producing an intense rush of pleasure. This flood of dopamine in the brain's reward system is what makes heroin extremely addictive. Physical dependence can develop within days of regular use.
Signs of Heroin Use
- Small, constricted pupils
- Drowsiness and "nodding off" at inappropriate times
- Track marks or bruising on arms
- Sudden weight loss
- Runny nose (if snorted)
- Finding paraphernalia (needles, burnt spoons, rubber tubing)
Heroin Withdrawal Timeline
Heroin withdrawal is extremely uncomfortable but generally not life-threatening when medically managed.
Hours 6–12: Early Symptoms
Anxiety, muscle aches, sweating, yawning, and insomnia begin.
Days 1–3: Peak Symptoms
Severe cramping, diarrhea, nausea, vomiting, dilated pupils, and intense drug cravings.
Days 5–7: Subsiding
Physical symptoms decrease. Psychological symptoms (depression, anxiety, cravings) may continue for weeks.
Treatment Options
Evidence-based treatment for heroin addiction includes medication-assisted treatment combined with behavioral therapy. MAT with buprenorphine or methadone is considered the gold standard, reducing mortality by over 50%. Learn more about the heroin withdrawal process and how medical detox can help.
Withdrawal Timeline
Onset
6–12 hours after last use
Peak Symptoms
1–3 days
Duration
5–7 days (acute)
Overdose Warning Signs
If you suspect an overdose, call 911 immediately.
Naloxone (Narcan) can reverse this overdose type. Administer it right away.
An estimated 1.1 million people aged 12+ reported heroin use in 2022. Heroin-involved overdose deaths, while declining, remain significantly elevated due to fentanyl contamination.
Frequently Asked Questions
How addictive is heroin?
Heroin is one of the most addictive substances known. Approximately 25% of people who try heroin become dependent. The intense euphoria and rapid physical dependence make it exceptionally difficult to quit without professional help.
Is heroin still a problem with fentanyl around?
Yes. While fentanyl has surpassed heroin as the leading cause of opioid overdose deaths, heroin remains widely used. A major concern is that much of the heroin supply is now contaminated with fentanyl, dramatically increasing overdose risk.