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U-47700

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Found in: 


Fentanyl 

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Type/Reason added: 


Synthetic Opioid

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Relative Potency: 


10% of fentanyl, 7.5 times more potent than morphine (10)

Description and Classification

U-47700:

A synthetic opioid developed in the 1970s by the Upjohn Company during research for non-addictive painkillers. It is a selective μ-opioid receptor agonist but structurally different from traditional opioids like morphine or fentanyl. It is classified as a non-fentanyl synthetic opioid.

Relative Potency

Potency: 

U-47700 is approximately 7–8 times more potent than morphine by weight. While it is less potent than fentanyl, it remains highly dangerous because of its strong respiratory depressant effects at relatively low doses.

Why It Is Added

Purpose

It has appeared on the illicit market mainly for recreational use, sought for its potent euphoria and pain relief.

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