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Deadly 'Cychlorphine' Spreads Unchecked Across US States
8 Apr
Summary
- A potent new synthetic opioid, cychlorphine, is spreading rapidly across the US.
- Cychlorphine may be up to 10 times more potent than fentanyl.
- Standard drug tests often fail to detect cychlorphine, complicating response.

A potent new synthetic opioid, cychlorphine, has been detected in numerous overdose deaths across the United States, raising significant public health concerns. This dangerous compound, believed to have originated in China in 2024 and spread through Europe before reaching the U.S. later that year, is proving difficult to track.
Officials report that cychlorphine may be up to 10 times more potent than fentanyl, a synthetic opioid already responsible for a large percentage of overdose deaths. This extreme potency dramatically increases the risk of fatal overdose, as users may succumb to respiratory failure before medical help can arrive.