Medically reviewed by Kevin Wandler, MD, Chief Medical Advisor
Most people have heard of fentanyl by now. Fewer have heard of nitazenes, a group of synthetic opioids that public health and law enforcement agencies have been warning about. Nitazenes have been found in counterfeit pills and in powders sold as other drugs, and some are extremely potent. People who encounter them usually do not know they are there.
This article explains what nitazenes are, why they raise concern, how they affect overdose response and where to find help. The goal is to give you clear information so you can protect yourself and the people you care about.
What Are Nitazenes?
Nitazenes are a class of synthetic opioids first developed decades ago as potential pain relievers. They were never approved for medical use, largely because of their risks. In recent years, versions of these compounds have appeared in the illicit drug supply.
The Drug Enforcement Administration has placed a number of nitazenes under the most restrictive federal control, meaning they have no accepted medical use and a high potential for misuse. Because makers can alter their chemical structure, new versions continue to appear.
Why Nitazenes Are a Concern
Potency
Some nitazenes are considered comparable to or stronger than fentanyl. That means a very small amount can cause life-threatening respiratory depression, especially in a person without opioid tolerance.
Hidden in other drugs
Nitazenes have been found in counterfeit pills made to look like prescription opioids and benzodiazepines, and mixed into powders sold as heroin, fentanyl or other substances. Someone buying what they believe is a familiar drug may be exposed to something much stronger.
Hard to detect
Standard fentanyl test strips are designed to detect fentanyl and may not detect nitazenes. A negative fentanyl test does not mean a drug is free of other synthetic opioids. Routine drug screens in medical settings may also miss them.
How Nitazenes Affect Overdose Response
The signs of a nitazene overdose look like any opioid overdose: pinpoint pupils, extreme drowsiness or unresponsiveness, slow or stopped breathing, gurgling sounds, and blue or gray lips and fingertips.
Naloxone can reverse opioid overdoses, including those involving nitazenes. Because some nitazenes are so potent, more than one dose of naloxone may be needed. If you suspect an overdose:
- Call 911 right away.
- Give naloxone if you have it, following the package directions and any guidance from the 911 dispatcher.
- If they are breathing, place them on their side to keep the airway clear.
- Stay with them until emergency responders arrive, because symptoms can return as naloxone wears off.
For a broader overview of warning signs, see our article on drug overdose symptoms.
Lowering the Risk
- Only use medications prescribed to you and filled by a licensed pharmacy.
- Keep naloxone at home, in the car or in a bag, and make sure others know where it is.
- Avoid mixing opioids with alcohol, benzodiazepines or other sedatives, which increases overdose risk.
- Avoid using alone, so someone can call for help if needed.
- Be especially cautious after a period of not using. Tolerance drops quickly, and a previously familiar amount can become dangerous.
Times When Risk Is Especially High
With a drug supply that can include nitazenes, certain moments carry extra danger. Tolerance to opioids drops quickly when a person stops using, even for a short time. Returning to a previously familiar amount after a break can be enough to cause an overdose, and a stronger synthetic opioid makes that risk even greater.
Periods to be especially careful include:
- After finishing detox or a treatment program
- After a hospital stay or time in jail
- After trying to quit on your own for a while
- When switching to a new source or a different form of a drug
If you or someone you love is in one of these situations, make sure naloxone is close by and that the people around you know how to use it. Better yet, connect with ongoing care that lowers the chance of returning to use.
Withdrawal and Treatment
People who have been using drugs that may contain nitazenes are generally dealing with opioid dependence, and withdrawal can be intense. Symptoms are similar to other opioid withdrawal: muscle aches, restlessness, sweating, stomach upset, trouble sleeping, anxiety and strong cravings. Stopping and then returning to use carries a high risk of overdose, which is why medical support matters.
If benzodiazepines or alcohol are also part of your use, tell your care team. Withdrawal from those substances can be life-threatening, and they should not be stopped abruptly without medical guidance.
At Promises Dallas-Fort Worth, our opioid detox provides medically supervised withdrawal management in Lewisville, with medication-assisted treatment used during detox when clinically appropriate. After detox, our opioid addiction treatment combines therapy, medical care and aftercare planning.
Medications for opioid use disorder can reduce cravings and lower the risk of overdose. Our team can talk with you about medication-assisted treatment and how it may fit your recovery plan.
Frequently Asked Questions
Are nitazenes the same as fentanyl?
No. They are a different chemical class of synthetic opioids, but they act on the same opioid receptors and can be similarly dangerous or more so.
Does naloxone work on nitazenes?
Yes, naloxone can reverse nitazene overdoses, though more than one dose may be needed. Always call 911 as well.
How would I know if I have been exposed to nitazenes?
Usually you would not. That is why it is safest to assume any drug from an illicit source may contain potent synthetic opioids.
Take a Step Toward Safety
If you or someone you love is using opioids from unknown sources, reaching out for help is one of the most protective steps you can take. Our admissions team is available 24/7, and same-day admission is often possible when a bed is available. If you are having thoughts of suicide, call or text 988.
Ask about free, confidential insurance verification or visit our insurance options page. Call (469) 546-9303 or contact us online.