Medetomidine in the Drug Supply: What You Need to Know

The unregulated drug supply continues to change, creating new risks for people who use drugs and the communities that care about them. One substance receiving increased attention is medetomidine, a potent sedative used in veterinary medicine that is now appearing in fentanyl-containing drugs.

Understanding what medetomidine does and how to respond during a suspected overdose can help save a life.

What Is Medetomidine?

Medetomidine is a veterinary medication used to sedate animals. It is not approved for human use. When consumed, it can cause an extremely slow heart rate, low blood pressure, and deep or prolonged sedation.

Because medetomidine is often mixed with fentanyl, a person may experience the effects of both an opioid and a powerful sedative at the same time. They may be difficult to wake, breathe slowly or stop breathing, and remain unconscious for an extended period.

Does Naloxone Work?

Naloxone can reverse the effects of opioids such as fentanyl, so it should always be given when an opioid overdose is suspected.

However, naloxone does not reverse medetomidine. This means a person may begin breathing again after receiving naloxone but remain heavily sedated because of the medetomidine in their system.

Do not assume the naloxone “didn’t work” simply because the person does not immediately wake up. They may still need additional doses of naloxone, breathing assistance, and emergency medical care.

What to Do if Someone Is Unresponsive

Treat an unresponsive person as a medical emergency.

1. Call 911 immediately.

   Tell the dispatcher the person is unresponsive and may have overdosed.

2. Administer naloxone.

   Give naloxone if it is available, even when you do not know exactly what substances were taken.

3. Check their breathing.

   Look for chest movement and listen for normal breathing. Gasping, snoring, or irregular breaths are not normal.

4. Provide breathing support.*

   *Begin rescue breathing or CPR if you are trained or instructed to do so by the 911 dispatcher.

5. Stay with the person.

   Continue following the dispatcher’s instructions until emergency responders arrive.

Never assume someone is simply sleeping. When a person cannot be awakened, responding quickly can make the difference between life and death.

Staying Prepared Protects Our Community

An unpredictable drug supply makes overdose education and preparation more important than ever. Carrying naloxone, recognizing the signs of an overdose, and knowing how to provide emergency support can give someone another chance.

That chance can lead to treatment, connection, healing, and recovery.

At Serenity House, we believe every life is worth saving, and every person deserves access to compassionate, evidence-based support. By staying informed and prepared, we can help protect our families, friends, and neighbors.

Knowledge saves lives. So can you.