At a Glance
Dosage
insufflated
| Level | Heroin | Fentanyl |
|---|---|---|
| Threshold | 5 mg | 5 μg |
| Light | 7.5–20 mg | 10–25 μg |
| Common | 20–35 mg | 25–50 μg |
| Strong | 35–50 mg | 50–75 μg |
| Heavy | 50 mg | — μg |
Only in Heroin
intravenous
| Level | Dose |
|---|---|
| Common | 5–8 mg |
Duration
insufflated
Heroin
insufflated
Peak
Offset
Afterglow
Onset: 10 sec – 1 minCome Up: 10 sec – 1 minPeak: 1 min – 1.5 hrsOffset: 1 hrs – 3 hrsAfterglow: 1.5 hrs – 3 hrs
Total: 3 hrs – 7 hrs
Fentanyl
insufflated
Onset
Onset: 15 min – 30 min
Effects
Shared Effects20
Safety
Interaction: Heroin + Fentanyl
No direct interaction data available between these substances. This does not mean the combination is safe.
Frequently Asked Questions
What is the difference between Heroin and Fentanyl?
Heroin is classified as a Opioids (Substituted morphinans) while Fentanyl is classified as a Opioids (Anilidopiperidine, Substituted piperidines). They share 20 effects in common, with 2 effects unique to Heroin and 6 unique to Fentanyl.
Is it safe to combine Heroin and Fentanyl?
There is no direct interaction data available for combining Heroin and Fentanyl. This does not mean the combination is safe. Always exercise caution and research thoroughly.
Which is stronger, Heroin or Fentanyl?
At common doses via insufflated, Heroin is typically dosed at 20–35 mg while Fentanyl is dosed at 25–50 μg. However, "stronger" depends on context — potency, subjective intensity, and duration all factor in. These substances have different pharmacological profiles and comparing raw potency is not straightforward.