A woman in her late thirties walks into a sharehouse on the north coast of New South Wales. She's there to sit for kambo — the secretion of an Amazonian tree frog, dabbed into small burns on her skin. She's done it before. She trusts the woman administering it. A few hours later she's dead on the floor, and her housemate is on the phone to triple-zero because the person running the ceremony doesn't know the number and doesn't own a phone.

That's not a hypothetical. That's the case the NSW state coroner ruled on, and the findings should be required reading for anyone thinking about kambo, ayahuasca, or any plant medicine ceremony run outside the bounds of medical oversight. The coroner's language was unusually direct: vulnerable people are putting their trust in self-styled healers who don't have basic first aid training, and the risks of kambo are being underestimated by the people promoting it.

If you're reading this because you're weighing a retreat, or because a friend has been raving about how kambo changed their life, slow down. This one's worth thinking through.

What kambo actually is — and isn't

Kambo is the waxy secretion of Phyllomedusa bicolor, the giant monkey frog of the Amazon basin. Indigenous groups in the region — the Matsés, Katukina, Yawanawá and others — have used it for generations, traditionally before hunting, to sharpen the senses and clear what they describe as panema, a kind of bad luck or heaviness. The frogs are tied to sticks, their backs scraped, and the dried secretion is later applied to small burns on the skin of the recipient.

What happens next is intense and fast. Within seconds of application, the peptides in the secretion hit the bloodstream. Blood pressure crashes or spikes. The face swells. People vomit, sometimes violently. There can be diarrhea, sweating, racing heart, panic, a sense of overwhelming heat. The acute phase is usually short — twenty to forty minutes — but those minutes are not gentle.

In the West, kambo has been folded into the broader neo-shamanic scene and marketed as a deep physical and spiritual cleanse. You'll see claims about boosting the immune system, clearing addiction, treating depression, even helping with cancer. Here's the part the coroner was explicit about: there is no credible research supporting those medicinal claims. There is, however, documented evidence of harm.

The risks people don't want to talk about

Kambo contains a cocktail of bioactive peptides — dermorphin, deltorphin, phyllomedusin, phyllokinin, sauvagine and others. Some are being studied for legitimate pharmaceutical reasons. But the dose in a ceremony isn't measured. The peptide concentration varies frog to frog, batch to batch, practitioner to practitioner. You don't know what you're getting.

The physiological strain is real. Kambo can trigger severe hyponatremia (low sodium) if practitioners encourage the loading of water beforehand — a practice that has killed people. It puts stress on the cardiovascular system. It can interact dangerously with prescription medications, particularly antidepressants and blood pressure drugs. People with cardiac conditions, epilepsy, recent surgeries, or who are pregnant should not go near it. And here's the thing — most ceremony providers don't do a serious medical screen. They ask a few questions. They take your word for it.

Adverse events documented in the medical literature include seizures, psychosis, kidney injury, esophageal tears from violent vomiting, syndrome of inappropriate antidiuretic hormone secretion, and sudden cardiac death. The Australian Therapeutic Goods Administration eventually classified kambo as a Schedule 10 poison — the most restrictive category, meaning substances of such danger to health that their sale, supply and use should be prohibited. That's not a regulator being squeamish. That's a regulator looking at a death toll.

How did 'maestra' culture get so unregulated?

The deeper problem the coroner pointed at isn't kambo itself — it's the parallel economy of self-credentialed healers, priestesses, maestras and shamans that has grown up around plant medicines in the last two decades. Someone takes a two-week course online, designs a website, picks a Spanish or Quechua honorific, and starts charging for ceremonies.

This isn't gatekeeping for its own sake. Indigenous traditions that work with kambo, ayahuasca, or peyote involve years of apprenticeship, often a lifetime, with extensive teaching about dosage, contraindications, energetic management, and crucially what to do when something goes wrong. A two-week certificate doesn't replicate that. Neither does charisma. Neither does a beautiful altar.

The case in NSW is bleak on this point. The person administering kambo at the fatal ceremony admitted she didn't know the emergency number. She didn't have a phone. The recipient herself had just completed a short practitioner course and was, on the day, leading the session. Two people, neither equipped for what was about to happen, in a sharehouse, with no medical backup. The result is exactly what you'd expect when you remove every safeguard.

How to think about plant medicine ceremonies before you sign up

None of this means every retreat is a death trap. Reputable plant medicine retreats — including ayahuasca centers in Peru, ibogaine clinics in Mexico, and psilocybin retreats in the Netherlands and Jamaica — operate with screening protocols, medical staff on site, and clear emergency procedures. They're not hard to identify if you know what you're looking for.

Some questions worth asking any retreat or practitioner before you hand over money:

• What's your medical screening process? A real one will ask about cardiac history, medications, mental health diagnoses, family history of psychosis, recent surgeries, and pregnancy. A pdf intake form that just asks for your name is not screening.
• Is there a medic on site? For kambo specifically, is there someone trained in advanced first aid, with IV fluids and emergency medications available?
• What's the nearest hospital, and how long does it take to get there? In the Amazon, the honest answer is sometimes hours. That should factor into your decision.
• How long have you been training, and with whom? Names. Lineages. Verifiable mentors. Not vibes.
• What medications and conditions are absolute contraindications for what you offer?
• How many people do you sit at once, and what's the facilitator-to-participant ratio?
• What does integration support look like in the weeks after?

If the answers are vague, defensive, or wrapped in spiritual language designed to make you feel like asking is beneath the work — walk away. A serious practitioner welcomes those questions. They've thought about them more than you have.

Where kambo sits in the broader plant medicine conversation

It would be easy to read a story like this and decide all plant medicine is reckless. That's not quite right either. Ayahuasca, psilocybin, ibogaine, and other psychedelic substances are being studied with increasing seriousness for addiction, treatment-resistant depression, PTSD, and end-of-life anxiety. Some of the early clinical data is genuinely promising. People do find their lives reorganized by these experiences in ways they couldn't access through talk therapy alone.

But the gap between a well-run clinical or ceremonial container and a sharehouse ritual run by an under-qualified practitioner is enormous. The medicine isn't the only variable. Set, setting, screening, dosage, facilitation, and aftercare matter as much as the substance itself — often more. The deaths and serious injuries that make headlines almost always involve a breakdown somewhere along that chain, not the molecule acting alone.

Kambo is a particular case because the claimed benefits are largely unsupported by research while the physiological risks are well documented. That's a worse risk-benefit profile than most of the classical psychedelics. If you're drawn to the idea of a deep cleanse or a hard reset, there are safer roads to walk down — including ones that involve less dramatic medicines or none at all.

The harder, quieter point

The woman at the center of the coroner's findings was, by every account, kind, smart, in pain, and looking for a way through. That's most of the people I meet at retreats. The pull toward plant medicine isn't usually about thrill-seeking — it's about real suffering and the sense that conventional options have run out. That's a sympathetic, human place to be.

It's also a place where you're easy to take advantage of. Pain makes us bad consumers. We grasp at the first practitioner who speaks the right language, lights the right candles, says the right things about our wounded inner child. The work of choosing well — slowly, with skepticism intact — is part of the medicine itself. Maybe the first part of it.

If you're researching plant medicine because something in your life is genuinely stuck, take the time to do it properly. Read inquest findings. Read peer-reviewed studies. Talk to people who've sat with the practitioner you're considering, ideally years after their ceremony, not weeks. And if you do want to explore vetted ayahuasca, psilocybin, or other plant medicine retreats with proper screening and integration support, you can browse our marketplace here and compare options without the pressure.

The medicine isn't going anywhere. Take your time.