Opioids
Butyrylfentanyl
Street names: BF, Butyryl fent
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Fentanyl-like euphoria and sedation
- Pain relief
- Shorter duration than fentanyl
⚠Key risks
- Roughly 1/7 the potency of fentanyl — but still fatal in milligram errors
- Often sold as heroin or fake pills
- Multiple naloxone doses usually needed
✚Overdose signs
- Pinpoint pupils
- Slow or stopped breathing
- Unresponsive, limp body
Category comparison — Opioids
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| Butyrylfentanyl | Schedule I | Roughly 1/7 the potency of fentanyl — but still fatal in milligram errors; Often sold as heroin or fake pills | ~$30–$80/g where found |
| Heroin | Schedule I | Extremely addictive — physical dependence in weeks; Overdose: breathing slows or stops | ~$10–$40 per bag |
| Fentanyl | Schedule II | Respiratory depression; Addiction in days | ~$20–$40 per counterfeit pill |
| Fentanyl HCl (powder) | Schedule II / analogue prosecutions | Lab-purity powder is far stronger than street mixes; Weighing errors are fatal | ~$60–$120/gram wholesale equivalent |
| Acetylfentanyl | Schedule I | ~5–15× weaker than fentanyl but still deadly at gram-level mistakes; Frequent cause of cluster overdoses | ~$25–$60/g where found |
| Furanylfentanyl (Fu-F) | Schedule I | Linked to hundreds of fatal overdoses 2016–2018; Potency similar to fentanyl | ~$20–$50/g |
Street prices are regional estimates. Potency and cuts vary constantly.
?Frequently asked questions
What does Butyrylfentanyl look like?
White/off-white powder; also pressed into counterfeit oxycodone pills
What are the signs of a Butyrylfentanyl overdose?
Pinpoint pupils; Slow or stopped breathing; Unresponsive, limp body Call emergency services immediately and give naloxone if available — it reverses opioid overdoses.
How addictive is it?
Roughly 1/7 the potency of fentanyl — but still fatal in milligram errors Dependence can develop with regular use.