U-47700 | The JHI

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U-47700

Found in:  

Fentanyl

Type/Reason added:  

Synthetic Opioid

Relative Potency:  

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

Overview

The Effects

Treatment Options

Supportive Care:

Continuous oxygen therapy if breathing is shallow but present, or assisted ventilation (such as bag-valve-mask ventilation) if the patient is not breathing adequately. Monitoring vital signs closely (especially respiratory rate, oxygen saturation, and heart rhythm) is critical.

Antidote:

Naloxone (Narcan) is effective for reversing U-47700 overdoses, but high doses or repeated administration may be necessary. Reported intoxication management required 0.4-4 mg naloxone to respond (12). Emergency medical support, especially assisted breathing, is critical. Hospitalization may be required for observation after overdose reversal because of the risk of re-narcotization once naloxone wears off.

Pharmacokinetics and Dynamics

Metabolism:

U-47700 is primarily metabolized in the liver. Its breakdown products are excreted via urine. There is some evidence suggesting involvement of cytochrome P450 enzymes, but detailed metabolism studies are relatively sparse compared to more common opioids.

Drug-Drug Interactions:

Combining U-47700 with other central nervous system depressants, like alcohol, benzodiazepines, barbiturates, or other opioids, drastically increases the risk of fatal respiratory depression. It may also interact with drugs that inhibit liver enzymes, potentially leading to dangerous accumulation in the body.