Is Ayahuasca Dangerous? What the Data Actually Says
The honest answer is more reassuring than the headlines and more demanding than the romanticism. Both halves matter.
The plant itself has a favorable safety profile in healthy people, in responsible settings.
In a review of 58 deaths associated with ayahuasca, none could be attributed to acute intoxication from the traditional brew on its ownRuffell 2023
Almost all real harm traces to three things instead: drug interactions, undetected medical conditions, and ceremonies run without supervision or protocol. Those are the things to actually worry about — and all three are addressable before you go.
When you search this question you get two kinds of answers: alarmist headlines about deaths, and enthusiast forums telling you it is perfectly safe and life-changing. Neither is useful when you are the person trying to make a decision. Here is what the published research actually supports.
What the safety profile looks like
Peer-reviewed research describes a wide therapeutic margin, with no reported acute or long-term toxicity, along with low addiction potential and low cardiovascular riskRuffell 2023 That is a genuinely favorable profile, and it is worth stating plainly rather than burying it.
The qualification: "low in healthy people, in responsible settings" is not the same as "zero in anyone, anywhere." Ayahuasca does produce measurable physiological changes — for example a modest rise in diastolic pressure, on the order of 9 mmHg, in the hours after a high doseRuffell 2023 For a healthy person that is unremarkable. For someone with significant cardiovascular disease it is not.
The 58 deaths, in context
This is the finding that most directly answers the question, and it deserves to be read precisely. In a review of 58 deaths associated with ayahuasca, none could be attributed to acute intoxication from the traditional brew — Banisteriopsis caapi plus Psychotria viridis — on its ownRuffell 2023
"Associated with" is doing real work in that sentence. The deaths happened. What the review found is that the cause lay elsewhere: mixing with other substances, undetected medical conditions, centers operating without any protocol, and above all drug interactions.
If the danger were the plant itself, there would be nothing you could do about it except decide whether to accept the risk.
Because the danger is concentrated in interactions, screening, and setting, almost all of it is controllable in advance — by a medical review, an honest inventory of what you take, and choosing a center that screens you properly.
The three real risks
1. Drug interactions
This is the big one, and it has its own article. In short: the β-carbolines in the vine are MAO inhibitors, which is what makes the DMT orally active — and also what leaves certain other substances without their brakes. Serotonergic antidepressants are the primary concernMAPS 1995, along with tramadol, dextromethorphan in cough syrups, St John's Wort, decongestants, and stimulants.
2. Undetected medical and psychiatric conditions
The risk of a psychotic episode is worth stating carefully, because it is where most of the fear lives. The rate of psychotic episodes among ayahuasca users appears comparable to that of the general population, and establishing causality is difficult because pre-existing conditions and other substance use are usually involvedRuffell 2023
In other words: ayahuasca does not "drive just anyone crazy." But it can be a trigger in someone who already carries an underlying vulnerability. That is precisely why serious centers screen, and why the research explicitly recommends screeningRuffell 2023
3. The setting, and who is running it
In 2019 ICEERS published, together with a public health department, the first official guide to safety standards for ayahuasca sessionsICEERS 2019 A consensus on what responsible practice looks like already exists, which means you are not guessing.
The same guide acknowledges something uncomfortable: reports of malpractice by facilitators are rising, driven by a lack of training, experience, and ethicsICEERS 2019 Not everyone running ceremonies is qualified to do so. Choosing where and with whom is the most consequential safety decision you make after the medical review.
What is unpleasant but not dangerous
Worth separating out, because people conflate the two. Nausea and vomiting are reported by around 62% of participantsRuffell 2023 — the purge is the norm, not a complication, and in the tradition it is understood as part of the cleansing rather than a side effect. Intense fear, crying, trembling, overwhelming imagery, a dissolving sense of time: hard, yes. Dangerous, no.
A difficult experience is not the same thing as harm. Research suggests difficult psychedelic experiences may not harm outcomes when they are resolved through emotional opennessRuffell 2023
The honest summary
Ayahuasca is not the roulette wheel the headlines suggest, and it is not the harmless plant medicine the enthusiasts describe. It is a powerful substance with a favorable physical safety profile and a small number of specific, well-documented, largely preventable ways to get hurt.
Which means the useful question is not "is ayahuasca dangerous." It is: have I ruled out the interactions, been screened honestly, and chosen a center that takes this as seriously as I do?
Sources
Every medical or safety claim on this page traces to one of these. This is the same editorial rule the full course follows.
- Ruffell 2023Ruffell, S. G. D., et al. (2023). Ayahuasca: A review of historical, pharmacological, and therapeutic aspects. Psychiatry and Clinical Neurosciences Reports, e146. DOI 10.1002/pcn5.146.
- MAPS 1995MAPS (1995). MAOI Contraindications [related to Ayahuasca]. MAPS Newsletter v6n1.
- ICEERS 2019ICEERS (2019). Towards Best Practices with Ayahuasca: A Guide for Organizers and Participants — the first guide of its kind published alongside a public health department.