Xylazine is a veterinary anesthetic approved for horses and cattle. It is not an opioid, not a human medicine, and has no approved antidote for human overdose. Since roughly 2020 it has spread through the US fentanyl supply; by 2023 the DEA found it in about a quarter of tested fentanyl powder, and detections have since been confirmed in Canada, the UK and continental Europe.
Why it's different from every other adulterant
- It slows breathing like an opioid but isn't one — naloxone will NOT reverse it (give naloxone anyway if fentanyl is possible; xylazine is almost always mixed with it).
- It causes necrotic skin wounds — 'tranq lesions' — black scabs that can appear anywhere on the body, not just injection sites, and can lead to amputation.
- It causes hours-long blackouts during which people are robbed, assaulted, or stop breathing.
If someone is unresponsiveCall emergency services immediately. Give naloxone if you have it (for the fentanyl). Xylazine has no field antidote — hospital supportive care (airway, breathing support) is the only treatment.
Why first responders are alarmed
Overdoses involving xylazine respond slower and less predictably. Blood pressure drops hard. Wounds need wound-care teams most paramedics don't carry. And users in withdrawal face both opioid withdrawal and xylazine withdrawal at once — a combination clinics are still learning to treat.
~25%of US fentanyl powder contained xylazine (DEA, 2023)
0approved human antidotes
hrstypical blackout length after a tranq-heavy dose
If you or someone you know is using tranq-dope
- Never use alone — call Never Use Alone (US): 1-800-484-3731
- Carry naloxone — it reverses the fentanyl half of the mix
- Treat every small wound seriously: clean, cover, and get medical care early — tranq wounds do not heal on their own
- Tell wound-care and outreach workers you use tranq — they now specialize in this