Cychlorphine: The New Opioid Up to 10 Times Stronger Than Fentanyl That Drug Tests Can’t See

Public Health Alert • Synthetic Opioids • Young Adult Safety

Cychlorphine: The New Opioid Up to 10 Times Stronger Than Fentanyl That Drug Tests Can’t See

What every young adult, parent, and clinician in Florida needs to know about the synthetic opioid hiding in fake Xanax, fake Percocet, and street drugs — why a negative fentanyl test strip no longer means “safe” — and exactly what to do to save a life.

By Mark G. Agresti, MD  |  Board-Certified Integrative Psychiatrist  |  Palm Beach, Florida  |  Updated September 23, 2026  |  Approx. 25-minute read

Why I Am Writing This

I have written a lot of articles on this blog — about anxiety, ADHD, depression, benzodiazepines, withdrawal, and addiction. This is the most important one I have ever written, and it is the longest, because I want it to be complete. People are dying. Many of them are young. Most of them had no idea what they were actually taking.

The drug is called cychlorphine. It is a synthetic opioid that health officials estimate may be up to ten times more potent than fentanyl. It is being pressed into counterfeit pills that look exactly like Xanax, Percocet, oxycodone, and Dilaudid, and it is being mixed into fentanyl, heroin, cocaine, and methamphetamine. And here is the part that keeps me up at night: it does not show up on fentanyl test strips, and it does not show up on the standard “opiate” drug screen. A young person can do everything they have been taught to do — test the pill, get a negative result — and still die.

If you read nothing else, read the box below. If you have a son, daughter, friend, or patient in their teens or twenties, please share this article with them. It could be the thing that keeps them alive.

A Game Weekend, Two Deaths, and a Warning That Swept Across the South

On Saturday, September 19, 2026, the University of Mississippi hosted LSU in one of the most emotionally charged football games of the season. Oxford was packed with visiting fans and celebrating students all weekend. By Monday afternoon, first responders were being dispatched to a campus residence hall for a possible overdose. Two Ole Miss students — one 18 years old, found on campus, and one 20 years old, found off campus — were confirmed dead.

Within hours, social media exploded. Posts claimed five, then seven students had died from Xanax bars laced with cychlorphine. Messages ricocheted through fraternity and sorority group chats across the Southeastern Conference — including at the University of Alabama, where student-run accounts urged their followers to assume that every drug was laced. Many Greek organizations canceled social events. Mississippi’s Attorney General publicly reminded students that “One Pill Can Kill” is a fact, not a slogan.

I want to be careful and honest here, because accuracy matters when lives are at stake:

• As of this writing, the causes of both deaths have not been determined. There is no publicly confirmed evidence that cychlorphine, fentanyl, or any synthetic opioid was involved.
• Local narcotics investigators opened two separate investigations and said there was no evidence the deaths were connected.
• Investigators reported finding retail-packaged kratom during the investigations, and authorities warned the public to avoid kratom products sold at gas stations. (More on kratom, 7-OH, and “pseudo” below.)
• The university and the coroner confirmed two deaths and asked the public to disregard unverified claims of more. A University of Alabama spokesperson said an alleged university statement circulating among Alabama’s Greek organizations appeared to be misinformation.

So why start with this story? Because whatever the toxicology ultimately shows, the scenario that terrified an entire region of college campuses is exactly how cychlorphine kills: a big weekend, a crowd, pills passed hand to hand, a young person with no opioid tolerance who thinks they are taking a “Xanax” to take the edge off. The rumor was unverified. The danger is not. A medical director of a Mississippi treatment center told local reporters that with a drug this potent, an amount the size of a grain of sand can kill — and that a counterfeit Xanax or counterfeit Adderall could contain it.

What Is Cychlorphine?

Cychlorphine (pronounced sy-KLOR-feen) is the street and media name for N-propionitrile chlorphine. It is a fully synthetic opioid — made entirely in a lab, not derived from the poppy plant. It was patented by Janssen Pharmaceuticals in 1967, during an era when drug companies were exploring new painkillers. It was never marketed and never approved for human use. More than fifty years later, it has resurfaced in the illicit drug market.

Chemically, cychlorphine belongs to a family forensic scientists call the “orphines” (technically, piperidine benzimidazolones). Its relatives include brorphine, which appeared in the drug supply around 2020, and spirochlorphine, which is often found alongside it. This matters for one crucial reason: cychlorphine is not fentanyl and is not a fentanyl analog. Its molecular structure is different — which is precisely why the tools we built to catch fentanyl do not catch it.

Like all opioids, cychlorphine works by activating the mu-opioid receptor in the brain and spinal cord. That produces pain relief and euphoria — and, at higher doses, the thing that kills: suppression of the brainstem centers that tell you to breathe. Laboratory research summarized by the United Nations Office on Drugs and Crime (UNODC) also found activity at the kappa- and delta-opioid receptors, and animal studies showed profound depression of both breathing and cardiovascular function at lower doses than fentanyl.

What does it look like?

Nothing distinctive. It has been found as a tan or off-white powder, pressed into tablets that mimic real prescription pills, and even on blotter paper. It has no telltale color, smell, or taste. You cannot see it, and you cannot tell it apart from the drug you thought you were buying.

How Strong Is It? Understanding “10 Times Fentanyl”

Let’s put the potency in perspective. Fentanyl is roughly 50 to 100 times stronger than morphine. It is the reason a single counterfeit pill can kill. In April 2026, the White House Office of National Drug Control Policy (ONDCP) issued a drug threat notice describing cychlorphine as up to ten times more potent than fentanyl. The Center for Forensic Science Research and Education (CFSRE), the nonprofit lab that first flagged it, has reported similar estimates from its pharmacology testing.

As a physician, I owe you nuance here. That “10x” figure comes from laboratory receptor assays and limited animal data. Nobody has run controlled human studies on this drug, and nobody should. Potency comparisons like this are not precise dose equivalents. It could be somewhat less than 10 times fentanyl in real-world use; it could, in some people and some combinations, behave even worse.

But here is the bottom line: the exact multiplier doesn’t change what you should do. A drug in fentanyl’s potency class or beyond, distributed in black-market pills with no quality control, will produce “hot spots” — pills or pinches of powder with far more drug than others. For someone with no opioid tolerance, one of those hot spots can stop breathing within minutes.

The Invisible Opioid: Why Tests Come Back Negative

This is the heart of this article, and it is the single most important thing I want every reader to understand. Cychlorphine slips through almost every layer of testing we rely on — from the test strip in a college student’s wallet, to the urine screen in a doctor’s office, to the toxicology panel in the emergency room, to the autopsy lab. Let’s go layer by layer.

Layer 1: Fentanyl test strips

Fentanyl test strips have saved countless lives. They work like a pregnancy test: antibodies on the strip are designed to recognize the specific shape of the fentanyl molecule. But cychlorphine has a different shape. The antibodies don’t recognize it, so a pill containing only cychlorphine will produce a negative fentanyl strip.

This creates something worse than no information: false reassurance. A careful young person who tests a pill and sees a negative result may feel safer taking it. In the current drug supply, a negative fentanyl strip means only one thing — that the strip didn’t detect fentanyl. It does not mean the pill is safe.

Layer 2: The standard urine drug screen

Many people assume that a urine drug test labeled “opiates” tests for all opioids. It does not. The standard “opiate” immunoassay was built to detect morphine and codeine (and heroin, which breaks down into morphine). It frequently misses even familiar semi-synthetic opioids like oxycodone unless a separate test is ordered, and fentanyl requires its own dedicated assay. A novel synthetic like cychlorphine is invisible to all of them. That means a person can be overdosing on an opioid and have a completely negative opioid drug screen.

Layer 3: The hospital toxicology panel

Emergency departments rely on rapid screens built around familiar drugs. Identifying cychlorphine requires specialized high-resolution mass spectrometry, usually performed at reference or research laboratories — not something most hospitals can run in real time. The ER team may know clinically that a patient is having an opioid overdose (pinpoint pupils, stopped breathing, response to naloxone), but the lab report will not tell them what caused it.

Layer 4: The medical examiner

Even after death, cychlorphine can go uncounted. Most medical examiner offices, hospitals, and health departments do not routinely test for it. Medical toxicologists have pointed out that we genuinely do not know where it is most concentrated, because we mostly find it only where someone thought to look. The places reporting the most deaths — like East Tennessee — may partly be the places that are testing the most.

Translation: every official death count you read is almost certainly an undercount. In Alabama, for example, a Birmingham-based addiction organization noted that only a small number of cases have been officially confirmed, while toxicology experts believe the drug is likely far more widespread than current data shows.

How It Spread: From a Miami Lab to Communities Across America

Cychlorphine’s story is following the same arc fentanyl did a decade ago: first a scattered detection here and there, then clusters of deaths, then counterfeit pills, then a nationwide problem. Officials in East Tennessee have said they believe it originated in China around 2024, moved into Europe, and reached the United States that same year.

Today, health officials report that roughly two dozen states have confirmed its presence locally, and state or local governments in Florida, Kentucky, New Jersey, Oklahoma, and South Carolina have issued public warnings. The greatest concentration of reported cases has been in Ohio, Tennessee, and Texas.

Florida: Where It Was First Found — and Why South Florida Should Pay Attention

Many Floridians are surprised to learn that the very first U.S. identification of cychlorphine happened here, at the DEA’s Southeast Laboratory in Miami in April 2024. Between then and March 2026, the DEA’s laboratory system identified it in 26 samples nationwide. Florida’s behavioral health association has circulated a public alert on the rise in fatal overdoses, and Florida’s Poison Control Centers have been sharing the national tracking data.

In the Panhandle, the Holmes County Sheriff’s Office warned residents in May that cychlorphine may be mixed into other drugs without users knowing and urged parents to talk with their children about pills bought illegally or through social media. Closer to home, when CBS12 asked the Martin County Sheriff about it that same month, he said that as far as he knew it had not yet appeared on local streets — but remember the testing problem. “Not detected” is not the same as “not here.”

South Florida has every ingredient that makes this drug dangerous: major trafficking corridors, a huge population of college students and young professionals, a vibrant nightlife and festival scene, and a steady flow of visitors. I treat young adults from Palm Beach to Miami, and I can tell you that counterfeit Xanax and “Percs” bought through Snapchat or from a friend of a friend are not rare. They are common.

How Cychlorphine Sneaks Into the Drug Supply

The substitution cycle

Illicit drug markets constantly adapt. When one substance gets banned or becomes easier to detect, manufacturers switch to a chemical cousin that is legal, cheaper, more potent, or harder to find. We saw this with fentanyl analogs, then with the nitazenes, then with brorphine. UNODC describes cychlorphine’s appearance as part of this same pattern of adaptive substitution. Until it was emergency-scheduled in August 2026, it was not specifically listed as a controlled substance at the federal level — and it still evades the field tests, strips, and screens built for fentanyl.

Extreme potency is a business advantage for traffickers: a tiny amount can be pressed into thousands of pills, which makes it cheap to produce and easy to smuggle. It is a catastrophe for the people who swallow those pills.

How people are exposed

Cychlorphine is rarely sold under its own name. It reaches people in several ways:

• Counterfeit prescription pills — swallowed, crushed and snorted, or smoked. These are pressed to look identical to real medications.
• As a hidden additive in powders — mixed into fentanyl, heroin, cocaine, and methamphetamine, whether snorted, smoked, or injected.
• As the only opioid present. In CFSRE’s national alert, cychlorphine was the sole opioid in 11 of 25 fatal cases — meaning there was no fentanyl for a test strip to catch at all.
• In dangerous cocktails. It has repeatedly been found alongside designer benzodiazepines (like bromazolam and phenazolam), other orphines, nitazenes, carfentanil, xylazine, and medetomidine — veterinary sedatives that naloxone cannot reverse.

“I Thought I Was Taking…” — What Investigators Are Actually Finding

The people dying from cychlorphine are often not people who think of themselves as opioid users. They thought they were taking a painkiller, a benzo for anxiety or sleep, a party drug, or a stimulant. Here is what forensic labs and public health agencies have documented:

Kratom, 7-OH, and “Pseudo”: A Parallel Danger Sold at the Gas Station

Because kratom surfaced in the Ole Miss investigations, I want to address it directly — and carefully. To date, I have not found any confirmed report of cychlorphine in retail kratom or 7-OH products. These are two different stories. But they are converging on the same young people, and both deserve your attention.

Kratom vs. 7-OH: not the same thing

Kratom is a plant from Southeast Asia, traditionally sold as a dried leaf powder, capsule, or tea. Its main alkaloid, mitragynine, has complex effects: stimulating at lower amounts, more sedating and opioid-like at higher amounts. Even traditional kratom can cause dependence.

7-hydroxymitragynine (“7-OH,” “seven,” “7-hydroxy”) is something else entirely. It exists in the kratom leaf only in trace amounts. The concentrated 7-OH in today’s gummies, tablets, shots, and vapes is typically manufactured semi-synthetically in a lab. It acts directly on the mu-opioid receptor — the Missouri Department of Health describes it as about 13 times stronger than morphine at the opioid receptor — and it is often misleadingly marketed as “natural kratom.”

“Pseudo” (mitragynine pseudoindoxyl, or MP) and other lab-modified kratom derivatives are the newest wave, sold in some smoke shops and online. The DEA’s July 2026 notice proposed emergency-scheduling concentrated 7-OH along with MP and two other 7-OH derivatives. When chemists start modifying plant alkaloids to make them stronger, we are no longer talking about an herbal supplement. We are talking about designer opioids with a friendly label.

Why this matters for overdose risk

• No regulation, no guarantee. These products are not tested for safety or accuracy. Toxicologists have found some contaminated with heavy metals, bacteria, and other pharmaceutically active drugs not listed on the label.
• They are opioids, and opioids stack. 7-OH taken with alcohol, benzodiazepines, sleep medications, or other opioids compounds the risk of respiratory depression.
• Rapid dependence. Addiction clinics across the country report a surge in patients with significant 7-OH withdrawal, including people who had been in long-term recovery from opioid use disorder before trying a “harmless” gas station product.
• A gateway to the illicit supply. When someone dependent on 7-OH can’t get it, or needs more, the next step is often street pills — which is exactly where cychlorphine lives.

Why College Students and Young Adults Are at the Highest Risk

• No opioid tolerance. A young person who occasionally takes a “Xanax” or a “Perc” has no built-in buffer. An amount that a long-term user might survive can stop their breathing.
• Alcohol and benzos multiply the danger. Game days, parties, and festivals combine alcohol, sedatives, and opioids — three substances that each suppress breathing, together.
• Pills feel safer than powder. A pill that looks pharmaceutical carries a false sense of legitimacy. Research on counterfeit pills shows many users believe they are authentic and would never knowingly take the drugs actually inside.
• Social media dealers. Snapchat, Instagram, and other apps make buying pills as easy as ordering food, with no way to verify anything.
• Using alone. Taking a pill to sleep, alone in a dorm or apartment, means no one is there to give naloxone.
• Untreated anxiety, insomnia, ADHD, and depression. In my practice, the most common reason a young adult buys a street Xanax or Adderall is not partying. It’s self-medicating something real that has never been properly treated.

Signs of an Opioid Overdose

A cychlorphine overdose looks like any other opioid overdose. Learn these signs:

• Unresponsive, or can’t be woken by shouting or a firm sternum rub
• Slow, shallow, irregular, or stopped breathing
• Gurgling, choking, or deep snoring sounds (this is not “sleeping it off”)
• Blue, gray, or ashen lips and fingertips
• Pinpoint (very small) pupils
• Limp body, cold or clammy skin, slow heartbeat

How to Respond: Every Second Counts

Two important notes. First, naloxone reverses opioids only. If the pill also contained a designer benzodiazepine or a veterinary sedative like xylazine or medetomidine, the person may remain sedated even after they start breathing again — which is why calling 911 is not optional. Second, naloxone is safe. If you give it to someone who isn’t on opioids, it won’t hurt them. When in doubt, give it.

Naloxone nasal spray is available over the counter at pharmacies throughout Florida, no prescription needed. Many college campuses, including in the Southeast, now offer it free in vending machines. I recommend that every household with a teenager or young adult keep at least two doses at home, and that every young adult carry it — whether or not they use drugs. You are far more likely to use it on a friend than on yourself.

Don’t let fear of police cost a life: Florida’s Good Samaritan law

Young people sometimes hesitate to call 911 because they’re afraid of getting themselves or a friend arrested. Florida has a medical-assistance immunity law (Florida Statutes §893.21) designed to protect people who seek emergency help for a drug overdose — and the person overdosing — from certain possession charges. The protections have limits, and this is not legal advice, but the principle is clear: Florida wants you to call. Please call.

For Parents: How to Talk About This Without Losing Your Kid

Parents often ask me what to say. Fear-based lectures tend to push young people away; honest, calm conversations bring them closer. Here is what I recommend:

• Lead with facts, not accusations. “I read about a new drug in fake pills that doesn’t show up on test strips. Have you heard about it?” opens a door that “Are you doing drugs?” slams shut.
• Make the one rule unmistakable: no pill from anyone other than a pharmacy. Not from a friend, not from a roommate’s prescription bottle, not from social media. Explain that a real prescription pill and a counterfeit are impossible to tell apart.
• Hand them Narcan and show them how it works. Frame it as protecting their friends.
• Offer a no-questions-asked lifeline. “If you or a friend are ever in trouble, call me. I’ll come get you, and we’ll talk about it later.”
• Ask about sleep, stress, focus, and mood. If your child is struggling with anxiety, insomnia, attention, or depression, getting them real treatment is the most powerful prevention there is.
• Watch for warning signs: unexplained pills or foil, pinpoint pupils, nodding off, sudden drops in grades or motivation, secretive phone use, new friend groups, money going missing, or kratom and 7-OH products from gas stations and smoke shops.

If You Use Drugs: Staying Alive Today

I would rather you be alive to come see me than have you stop reading because you feel judged. If you are going to use, please:

• Never use alone. If you have no one with you, the Never Use Alone hotline (1-800-484-3731) will stay on the line and send help if you stop responding.
• Carry naloxone, and make sure the people around you know where it is and how to use it.
• Keep using fentanyl test strips — but understand their limits. A positive result is a real warning. A negative result is not proof of safety.
• Don’t mix opioids, pills, or kratom products with alcohol, benzodiazepines, or sleep aids.
• Be especially careful after any break (jail, rehab, illness, or just time off). Tolerance drops fast, and your usual amount can become deadly.
• Reach out for treatment when you’re ready. Medications for opioid dependence dramatically reduce the risk of dying. You can start today.

For Clinicians and Emergency Teams

• A negative urine drug screen does not rule out an opioid toxidrome. Treat the clinical picture — miosis, CNS and respiratory depression, response to naloxone.
• Anticipate higher and repeated naloxone requirements and a risk of re-sedation. Consider extended observation and a naloxone infusion per your institution’s protocols when repeated boluses are needed.
• Think polysubstance. Co-detections with designer benzodiazepines, nitazenes, carfentanil, xylazine, and medetomidine are common. Persistent sedation after respiratory recovery suggests a non-opioid co-ingestant.
• Send expanded testing to a reference laboratory with high-resolution mass spectrometry capability when the history suggests counterfeit pills, and report suspected cases to the Florida Poison Information Center Network (1-800-222-1222) and public health authorities. Surveillance is how we find these clusters.
• Use every overdose as a treatment opportunity. Prescribe or dispense naloxone at discharge and offer or refer for buprenorphine or other medications for opioid use disorder. The weeks after a non-fatal overdose are among the highest-risk periods for death.
• Screen young adults routinely for non-prescribed benzodiazepine, stimulant, opioid, and kratom/7-OH use — without judgment.

The Real Solution: Treating What Drives the Pill

Law enforcement will keep chasing each new compound. Scientists will keep building new tests. Both are important. But as a psychiatrist, I know the drug supply will always be one step ahead. What we can control is the demand side — the reasons a young person reaches for a pill in the first place.

The young adults I see who have bought counterfeit Xanax almost always have real, untreated anxiety or insomnia. The ones who buy counterfeit Adderall often have attention problems that were never evaluated. The ones using street opioids or 7-OH frequently began by treating pain, trauma, or depression on their own. Every one of these conditions has safe, effective, evidence-based treatment:

• Anxiety and panic: psychotherapy, appropriate non-addictive medications, and lifestyle and nutritional strategies that calm the nervous system.
• Insomnia: cognitive behavioral therapy for insomnia (CBT-I), circadian rhythm work, and carefully chosen sleep support.
• ADHD: a proper evaluation and legitimate treatment with monitoring.
• Opioid and 7-OH dependence: FDA-approved medications such as buprenorphine, methadone, and naltrexone, plus withdrawal management, counseling, and long-term recovery support. These medications save lives.
• Depression and trauma: comprehensive psychiatric care that looks at the whole person — biology, psychology, sleep, nutrition, relationships, and purpose.

If you or someone you love is taking pills that didn’t come from a pharmacy, the most important step is not a better test strip. It’s a conversation with a professional who can treat what’s underneath.

Frequently Asked Questions About Cychlorphine

Is cychlorphine the same as fentanyl?

No. Both are synthetic opioids that act on the same receptor, but cychlorphine belongs to a different chemical family called orphines. That structural difference is why fentanyl test strips and fentanyl drug screens don’t detect it.

Is cychlorphine really 10 times stronger than fentanyl?

Federal officials describe it as up to 10 times more potent, based on laboratory and animal data. Human data are limited, so the exact figure is uncertain — but all evidence places it at or beyond fentanyl’s already lethal potency.

Does Narcan (naloxone) work on cychlorphine?

Yes. Naloxone reverses cychlorphine overdoses, but multiple doses may be needed. Always call 911, give naloxone, and give additional doses every 2–3 minutes if the person isn’t breathing normally.

Will cychlorphine show up on a drug test?

Usually not. Fentanyl test strips, standard urine “opiate” screens, and most hospital toxicology panels do not detect it. Confirming it requires specialized mass spectrometry at a reference laboratory.

Is cychlorphine in Florida?

Yes. The first U.S. detection was at the DEA’s laboratory in Miami in April 2024, and Florida agencies have issued public warnings. Because most labs don’t test for it, its true local prevalence is unknown.

How many people has cychlorphine killed?

ONDCP linked it to at least 55 U.S. deaths between 2025 and early 2026, and East Tennessee alone has since reported it present in 63 deaths. Because testing is limited, experts believe the real number is higher.

Did cychlorphine cause the Ole Miss student deaths?

As of September 23, 2026, officials have not determined the causes of the two students’ deaths, and there is no public confirmation that cychlorphine was involved. Investigators reported finding retail kratom products. Claims of additional deaths have not been verified.

Is cychlorphine in kratom or 7-OH products?

There are no confirmed reports of cychlorphine in retail kratom or 7-OH products to date. However, 7-OH is itself a potent opioid, these products are unregulated, and some have been found to contain undisclosed substances.

Is cychlorphine illegal?

Yes. On August 27, 2026, the DEA published a temporary order placing cychlorphine and three related orphines in Schedule I of the Controlled Substances Act.

How can I tell if a pill contains cychlorphine?

You can’t. It has no distinctive look, smell, or taste, and counterfeit pills are made to be indistinguishable from real ones. The only safe assumption is that any pill not dispensed by a pharmacy could contain it.

References & Further Reading

1. Center for Forensic Science Research & Education (CFSRE). Increase in Fatal Overdoses Linked to Novel Synthetic Opioid N-Propionitrile Chlorphine (Cychlorphine). January 30, 2026.
2. United Nations Office on Drugs and Crime. The emerging threat of cychlorphine: A new synthetic opioid raising concerns globally for public health. 2026.
3. American College of Medical Toxicology. Novel Opioid Cychlorphine Linked to Non-Fatal Overdose in First Direct Evidence of Patient Exposure. August 17, 2026.
4. Drug Enforcement Administration. Temporary Placement of 5,6-Dichloro Brorphine, 5,6-Dichloro Desmethylchlorphine, N-Propionitrile Chlorphine, and Spirochlorphine in Schedule I. Federal Register, July 1, 2026 (notice of intent); temporary order published August 27, 2026.
5. Knox County Regional Forensic Center. New Drug Cychlorphine Appearing in Other Deaths Across East Tennessee. April 6, 2026.
6. Medical Daily. A Tennessee Forensic Center Now Links 63 Deaths to a Synthetic Opioid Federal Officials Flagged in April. September 2026.
7. Becker’s Behavioral Health. Cychlorphine, explained: 10 things to know about the new synthetic opioid. September 2026.
8. TODAY. Her Son Thought He Bought Percocet. He Took a New Synthetic Opioid That Killed Him. September 2026.
9. The Spokesman-Review. Teen’s death sparks warning over opioid 10 times stronger than fentanyl. September 15, 2026.
10. KSLA. What is cychlorphine? Fake oxycodone pills may hide deadly synthetic opioids. May 1, 2026.
11. CBS12. New designer drug 10x more potent than fentanyl raising concerns in South Florida. May 13, 2026.
12. WKRG/WMBB. New drug Cychlorphine poses extreme overdose risks (Holmes County Sheriff’s Office). May 19, 2026.
13. Mississippi Today. Police investigate deaths of two Ole Miss students. September 22, 2026.
14. Action News 5. Two Ole Miss students found dead; investigation underway. September 22, 2026.
15. The Crimson White. Alabama groups speak out regarding University of Mississippi deaths. September 2026.
16. The Boston Globe. Addiction clinics see rising cases of kratom and 7-OH withdrawal. September 22, 2026.
17. Missouri Department of Health and Senior Services. 7-OH and Kratom.
18. From kratom to 7-hydroxymitragynine: evolution of a natural remedy into a public-health threat. PubMed Central review.
19. Filter. Of Course 7-OH and Cychlorphine Fit Schedule I Criteria. All New Drugs Do. July 2, 2026.

This article is for educational purposes only and is not a substitute for individual medical advice, diagnosis, or treatment. Information about cychlorphine is evolving rapidly; details reflect publicly available information as of September 23, 2026. Case vignettes are composites and do not describe real patients. If you believe someone is overdosing, call 911 immediately.