Indianapolis-area officials are warning that the local drug supply is becoming harder to predict and more dangerous by the day. Fentanyl is now being found alongside a growing list of synthetic substances, including veterinary sedatives and powerful unregulated opioids. The combinations can make overdoses more difficult to recognize and treat.
According to WISH-TV, the Drug Enforcement Administration’s Indianapolis district office joined the Marion County Coroner’s Office, IMPD and the Marion County Prosecutor’s Office in issuing a public safety warning Monday. Officials identified xylazine, nitazenes, cychlorphine and medetomidine as substances being mixed with fentanyl in the Indianapolis metro area.
Medetomidine Is Showing Up In Marion County Death Data
The warning follows months of local tracking of substances that are turning up in the illicit supply. A Marion County health report said medetomidine had entered the top five substances detected in suspected drug-intoxication deaths during the fourth quarter of 2025, appearing in 14% of cases.
WISH-TV reports that medetomidine was detected in nearly one out of every 14 confirmed drug-overdose deaths in Marion County so far in 2026. Local officials said their response will combine enforcement, prevention and public education, with prosecutors emphasizing that pursuing dealers remains an important tool.
The substances do not all behave the same way. Xylazine and medetomidine are veterinary sedatives, while nitazenes and cychlorphine are synthetic opioids; the Drug Enforcement Administration says these additives can increase potency, cause severe sedation or respiratory depression, and raise the risk of a fatal overdose.
Naloxone Still Matters But May Not Reverse Everything
Medetomidine and xylazine are not opioids, so naloxone may not reverse their sedating effects. The Centers for Disease Control and Prevention says naloxone should still be given in a suspected overdose because fentanyl is usually present, while rescuers call 911, keep the person’s airway clear and continue supporting breathing.
Indiana has been tracking medetomidine for more than two years. An Indiana Department of Health notification said the substance had been detected in returned syringes at multiple Marion County service sites, and that every medetomidine-positive syringe tested at the time also contained fentanyl or a fentanyl analog.
Officials are urging residents to assume any illicit drug may contain fentanyl or another synthetic additive, and to avoid pills that were not prescribed and dispensed by a licensed pharmacy. Marion County’s overdose-prevention program also lists local harm-reduction and treatment resources, including free test-strip access and a searchable directory of services through its Overdose Data to Action program.
