Gray death: Dangerous opioid combo is latest mixing trend

COLUMBUS, Ohio (AP) — Authorities are issuing warnings about a new and dangerous opioid combo they’re dubbing “gray death” that underscores the ever-changing nature of the U.S. addictions epidemic.

Investigators say they’ve detected the mixture or recorded overdoses blamed on it in Alabama, Georgia and Ohio.

The drug looks like concrete mix and varies in consistency from a hard, chunky material to a fine powder.

RELATED: ‘Gray death,’ the drug that looks like concrete, kills in one dose

The substance is a combination of several opioids, including heroin, fentanyl, carfentanil — sometimes used to tranquilize large animals like elephants — and a synthetic opioid called U-47700.

Deneen Kilcrease manages the chemistry section at the Georgia Bureau of Investigation’s crime lab.

She calls gray death one of scariest combinations she’s seen in 20 years of doing forensic chemistry drug analysis. provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others and keep the conversation on topic and civil. If you see an inappropriate comment, please flag it for our moderators to review.

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