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Federal investigators say lab testing uncovered counterfeit tablets laced with deadly opioid combinations in recent seizures across Colorado and Utah, raising fresh public safety concerns. The discovery — pills containing mixtures of fentanyl with either carfentanil or heroin — highlights how unpredictable and lethal illicit drugs have become.
The announcement came from the Drug Enforcement Administration’s Rocky Mountain Field Division after analyses at the DEA’s Southwest Laboratory identified the compounds. Officials say the counterfeit pills were recovered during separate law-enforcement actions in the Denver area, Colorado’s Western Slope and the greater Salt Lake City region.
What the tests showed
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Laboratory results indicate two distinct and hazardous combinations:
- Fentanyl and carfentanil in the same tablet — a particularly alarming mix because carfentanil, a veterinary tranquilizer, is vastly more potent than fentanyl.
- Fentanyl and heroin together in pill form — an unusual presentation for heroin and one that makes dose and effect highly unpredictable.
The seized tablets were described as blue, green, or blue-green in color. Investigators warn that appearance provides no reliable clue to what a pill contains.
Why this matters now
Fentanyl has been identified by federal authorities as the most significant drug threat facing the United States, and synthetic opioids have driven a sharp rise in overdose deaths in recent years. Adding carfentanil — which is estimated to be roughly 100 times more potent than fentanyl — or combining fentanyl with heroin increases the chance of fatal respiratory depression even at tiny doses.
DEA Rocky Mountain officials urged the public to avoid taking any pill that was not prescribed and dispensed by a licensed medical provider or pharmacy. David Olesky, the division’s special agent in charge, emphasized that pills obtained from unknown sources can contain life-threatening substances.
Practical takeaways
- Do not consume pills from unknown sources. Counterfeit tablets can look identical to legitimate medications.
- Assume high risk — even a small amount of fentanyl or carfentanil can be deadly.
- Seek immediate help for suspected overdoses: emergency medical services and overdose-reversal treatments such as naloxone can be lifesaving.
- Stay informed: the DEA maintains updated resources about fentanyl dangers and prevention strategies at dea.gov/fentanylfree.
Authorities continue to investigate the source of the counterfeit pills. For community members, the message from law enforcement is direct: pills acquired outside a medical setting are unpredictable and can be lethal.
