# Synthetic drug emergence and naloxone response in US

> Live situation record from CLSTR: https://clstr.news/situations/synthetic-drug-emergence-and-naloxone-response-in-us
> Updated: 2026-08-24T11:00:00.000Z. Sources: 2. Developments: 2.

The Ohio Narcotics Intelligence Center (ONIC) issued public-safety bulletins warning of dangerous new substances in the state’s drug supply. These include orphine analogs, a subgroup of new synthetic opioids that mimic morphine and fentanyl, and veterinary sedatives such as medetomidine and xylazine. Officials noted that these unpredictable polydrug mixtures pose a high risk of fatal overdose and complicate emergency responses.

In response to evolving drug threats, the FDA has approved Rextovy, a 4 mg naloxone hydrochloride nasal spray, for over-the-counter sale. This provides a third nonprescription nasal spray option for treating opioid overdoses in adults and children, alongside Narcan and RiVive. Authorities continue to urge the public to use naloxone and contact emergency services during suspected overdoses.

## Timeline

### 2026-08-24: Naloxone access expands as new synthetic drugs enter US supply

The FDA has approved Rextovy as a third over-the-counter naloxone nasal spray, while Ohio officials warn of new synthetic opioids and veterinary sedatives entering the local drug supply.

2 sources. https://clstr.news/cluster/naloxone-access-expands-as-new-synthetic-drugs-enter-us-supply

### 2026-08-03: Ohio warns of synthetic opioids and veterinary sedatives in drug supply

Ohio’s Narcotics Intelligence Center warned that new synthetic opioids and veterinary sedatives like medetomidine and xylazine are entering the state drug supply, raising overdose risks and prompting naloxone‑s

2 sources. https://clstr.news/cluster/ohio-warns-of-synthetic-opioids-and-veterinary-sedatives-in-drug-supply

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Cite as: Synthetic drug emergence and naloxone response in US. CLSTR, https://clstr.news/situations/synthetic-drug-emergence-and-naloxone-response-in-us