Opioids
Dextropropoxyphene (Darvon / Darvocet)
Street names: Darvon, Darvocet (with APAP), Proxyphene
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Weak opioid euphoria
- Pain relief
⚠Key risks
- Banned for causing fatal heart-rhythm disturbances even at normal doses
- Overdose is fast and often fatal — heart stops before breathing
- Old stock and foreign pills still circulate
✚Overdose signs
- Sudden collapse, cardiac arrest
- Slow breathing
- Seizures
Category comparison — Opioids
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| Dextropropoxyphene (Darvon / Darvocet) | Withdrawn in US/EU | Banned for causing fatal heart-rhythm disturbances even at normal doses; Overdose is fast and often fatal — heart stops before breathing | Black-market relic — price varies widely |
| 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 Dextropropoxyphene (Darvon / Darvocet) look like?
Pink capsules/tablets; combination pills with paracetamol
What are the signs of a Dextropropoxyphene (Darvon / Darvocet) overdose?
Sudden collapse, cardiac arrest; Slow breathing; Seizures Call emergency services immediately and give naloxone if available — it reverses opioid overdoses.
How addictive is it?
Banned for causing fatal heart-rhythm disturbances even at normal doses Dependence can develop with regular use.