New Invisible Opioids Are Killing People Without Detection

In Tennessee’s Knoxville area, a deadly opioid crisis is unfolding under the radar. Coroners have identified a new class of opioids known as orphines, including a compound called cychlorphine, which is 10 times more powerful than fentanyl. These drugs don’t show up on routine toxicology screens, leaving overdose victims’ deaths misclassified and the epidemic largely invisible.

Dr. Darinka Mileusnic-Polchan, chief medical examiner for three counties around Knoxville, discovered cychlorphine after pushing for advanced testing on a 52-year-old overdose victim whose standard toxicology came back negative. Since October, cychlorphine has been linked to at least 50 deaths in the area alone, with 11 orphine variants found across 14 states.

Orphines kill swiftly, often before the body shows typical overdose signs. Their novelty and the high cost of specialized tests mean many deaths are lumped under vague “unspecified narcotics” categories, masking the true scale of the crisis.

Mileusnic’s office has become a crucial public health hub, collaborating with law enforcement and outreach workers to spread awareness. They have emphasized that multiple doses of naloxone (Narcan) are often needed to reverse orphine overdoses, unlike the single dose usually effective for fentanyl.

Thanks to these efforts, Knox County saw a 36% drop in overdose deaths in 2024 — one of the sharpest declines nationwide. But many communities lack the resources and trained medical examiners to detect orphines, allowing these silent killers to claim lives unnoticed.

This hidden epidemic highlights the urgent need for better funding, training, and testing protocols nationwide to uncover and combat emerging opioid threats before more lives are lost.