Opioids
U-47700 (Pink / U4)
Street names: Pink, U4, Pinkyu4ea, U4EA
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Fentanyl-like opioid euphoria, sedation
⚠Key risks
- Linked to multiple DEATHS before scheduling — the drug behind the 2016 'pink' overdose wave
- Potency ~7× morphine
- Respiratory depression standard for the class
- Often mislabeled/sold as other drugs
✚Overdose signs
- Pinpoint pupils
- Slow/stopped breathing
- Blue lips
- Unresponsive
📋Quick facts
Also known asPink, U4, Pinkyu4ea, U4EA
CategoryOpioids
Schedule / classSchedule I (US, 2016)
AppearanceWhite or pink powder, pills; sold online as 'research chemical'
Street price~$20–$60/g grey-market (residual)
Legal statusSchedule I (US); controlled worldwide
Last updated2026-09-17
Sources: DEA, NIDA
Category comparison — Opioids
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| U-47700 (Pink / U4) | Schedule I | Linked to multiple DEATHS before scheduling — the drug behind the 2016 'pink' overdose wave; Potency ~7× morphine | ~$20–$60/g grey-market |
| Fentanyl | Schedule II | Respiratory depression; Addiction in days | ~$20–$40 per counterfeit pill |
| Carfentanil | Schedule II | 10,000× morphine potency — 1–2 mg (a few granules) can be fatal to humans; Found mixed into street heroin/cocaine — mass-overdose clusters | N/A — mass-casualty contaminant |
Street prices are regional estimates. Potency and cuts vary constantly.
?Frequently asked questions
What does U-47700 (Pink / U4) look like?
White or pink powder, pills; sold online as 'research chemical'
What are the signs of a U-47700 (Pink / U4) overdose?
Pinpoint pupils; Slow/stopped breathing; Blue lips Call emergency services immediately and give naloxone if available — it reverses opioid overdoses.
How addictive is it?
Linked to multiple DEATHS before scheduling — the drug behind the 2016 'pink' overdose wave Dependence can develop with regular use.