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By the time a drug like this reaches an American street corner or a counterfeit pill press, it has traveled through multiple countries, multiple handlers, and multiple layers of criminal infrastructure specifically designed to evade detection.

"This is not a street corner chemistry experiment. Cychlorphine is the product of a global criminal pharmaceutical industry — and it is deliberately engineered to be undetectable, unstoppable, and more lethal than anything that came before it."

WHAT LAW ENFORCEMENT IS UP AGAINST

The legal and law enforcement challenges posed by cychlorphine are unlike anything we have seen with prior opioid crises. First, detection is nearly impossible with current tools. Health officials have confirmed that standard fentanyl test strips — the frontline harm-reduction tool distributed to at-risk communities across the country — do not detect cychlorphine.

That means someone using a test strip in good faith to verify their drugs may receive a false negative and proceed to consume a substance that is orders of magnitude more deadly than they know.

Second, Narcan — the naloxone-based overdose reversal drug that has saved hundreds of thousands of lives during the fentanyl crisis — may be significantly less effective against cychlorphine, potentially requiring multiple doses in rapid succession.

That places an extraordinary and potentially impossible burden on first responders and community health workers who arrive at an overdose scene with limited supplies and limited time.

"It's not detected on the available fentanyl test strips. So, it's very important to really try to avoid counterfeit pills altogether."

- PHILIP COFFIN — DIRECTOR, CENTER ON SUBSTANCE USE AND HEALTH, SFDPH -

Third — and this is the dimension that keeps law enforcement officials and national security analysts up at night — cychlorphine's extreme potency makes it a potential tool for intentional harm.

When a substance is this lethal in microscopic quantities and this difficult to detect, the risk that it could be weaponized by bad actors — whether individual criminals, organized crime networks, or even hostile state-sponsored actors — becomes a serious public safety and national security concern that cannot be dismissed or minimized.

Cychlorphine is not arriving in isolation. Officials in New York City have simultaneously identified carfentanil — a sedative so powerful it is used to tranquilize elephants, and one of the most toxic substances known to exist — circulating in the city's drug supply for the first time. Alongside it, medetomidine, an animal tranquilizer described by experts as even more potent than xylazine — the so-called "zombie drug" that has already ravaged cities like Philadelphia — has been detected as well.