Ayahuasca Vs Bufo: Why We Serve One And Refuse The Other
Ayahuasca vs Bufo is not a choice between 2 strengths of the same thing. Ayahuasca is a brew you drink at night and it runs 4 to 6 hours. Bufo is 5-MeO-DMT, vaporized and inhaled, and in the only published dose-ranging trial the whole experience averaged 13.5 minutes.
The question worth asking isn’t which one is stronger. It’s what happens when you take them close together. Ayahuasca’s harmala alkaloids switch off the enzyme that clears 5-MeO-DMT, and they stay in your blood for up to a day. ICEERS, the research body most centers quote on this, puts the minimum gap at 24 hours. Plenty of retreats run Bufo the morning after a ceremony. That gap is closer to 13.
We run ayahuasca retreats in Cusco and we don’t serve Bufo at all. This is the reasoning, and the questions to put to a center that does.
This page is education, not medical advice. If you’re in crisis, having suicidal thoughts, or in psychosis, get emergency care now, not a retreat.
What ayahuasca and Bufo actually are
Ayahuasca vs Bufo compares an Amazonian plant brew with a secretion from a North American desert toad. Ayahuasca is Banisteriopsis caapi vine plus a DMT-bearing leaf, drunk at night, lasting 4 to 6 hours. Bufo is 5-MeO-DMT from the toad Incilius alvarius, vaporized and inhaled, lasting under 20 minutes. They share a family of molecules and nothing else.
| Ayahuasca | Bufo (5-MeO-DMT) | |
|---|---|---|
| Active compound | N,N-DMT plus harmala alkaloids | 5-MeO-DMT |
| Source | Caapi vine and chacruna leaf, boiled 12 to 16 hours | Toad secretion, or made synthetically in a lab |
| Region | Amazon basin | Sonoran Desert, northern Mexico and the US southwest |
| How it’s taken | Drunk | Vaporized and inhaled |
| Onset | 20 to 60 minutes | 1 to 50 seconds |
| Length | 4 to 6 hours | 13.5 minutes observed, 17.7 minutes self-reported |
| Posture | Lying on a mat, dark, eyes closed | Lying down, held, under 20 minutes |
| Documented ceremonial history | Centuries of Amazonian practice | Modern, traced to a 1985 pamphlet |
| US legal status | DMT is Schedule I | 5-MeO-DMT is Schedule I since 19 January 2011 |
| Main interaction risk | MAO inhibition with SSRIs, MAOIs, stimulants | Potentiated by ayahuasca’s harmala alkaloids |
Our brew is caapi vine and chacruna leaf, nothing else. Don Julio and Esteban cook it together over 12 to 16 hours, and at 2,900 meters water boils near 90 degrees Celsius instead of 100, so it takes longer to reduce than it would in the jungle. You drink 40 to 60 ml on a first night, lying on a mat in the dark, and what follows is closer to a long argument with yourself than a light show. We’ve written about what the night actually feels like hour by hour.
Bufo works in the opposite direction. There is no building, no arc, no time to change your mind. You inhale, and seconds later the person who was deciding things is gone. People call that ego dissolution, and it’s the only place the 2 medicines overlap, except that ayahuasca takes 2 hours to get there and gives you something to hold on the way.
How long does Bufo last compared with ayahuasca?
Bufo is finished in under 20 minutes. Ayahuasca runs 4 to 6 hours. The “about 20 minutes” the whole field repeats is a little generous.
In 2021, Reckweg and colleagues published a phase 1 dose-ranging study in Frontiers in Pharmacology that gave 22 healthy volunteers vaporized 5-MeO-DMT at 2, 6, 12 and 18 mg. Investigators timed the psychedelic experience at a mean of 13.5 minutes, with a standard deviation of 5.8. The volunteers themselves reported 17.7 minutes. Onset landed between 1 and 50 seconds.
Ours open at 8 PM. Don Julio closes around 3 AM, and the medicine itself runs 4 to 6 hours inside that. Set the 2 side by side and the ratio is roughly 20 to 1.
That ratio is the whole difference in temperament. Ayahuasca gives you hours to negotiate, resist, give up and come back. Bufo gives you no negotiation at all. Which one suits you is a real question. It is not the same question as which one is safer, and centers that blur the 2 are usually selling the shorter one.
Why you can’t do both in the same 24 hours
Because ayahuasca disables the enzyme that clears 5-MeO-DMT, and it stays disabled long after the ceremony ends.
Here’s the mechanism in plain terms. Caapi vine contains harmine, harmaline and tetrahydroharmine. Those are reversible MAO-A inhibitors, and that is the entire reason the brew works: swallowed DMT would be destroyed in your gut without them. 5-MeO-DMT happens to be cleared by the same enzyme. So the thing that makes ayahuasca active is the same thing that stops your body clearing Bufo.
ICEERS, the International Center for Ethnobotanical Education, Research and Service, published guidance on exactly this combination. Harmalines, it says, remain in the blood for up to 24 hours and inhibit both MAO-A and cytochrome 2D6, which means tryptamines stay in the body longer. Its recommendation is to wait at least 24 hours after drinking ayahuasca before inhaling Bufo. Taken the other way round, it advises waiting at least an hour after Bufo before drinking ayahuasca, and not inhaling Bufo again for 24 hours.
The named risk is hyperthermia, your body temperature climbing past where it should. ICEERS also records 2 deaths in the medical literature where harmalines and 5-MeO-DMT were both found at autopsy. One was a self-administration during an ayahuasca session.
Two deaths is not an epidemic. It’s also 2 more than the field usually mentions when it puts both medicines on the same menu.
Do the arithmetic on your retreat’s schedule
A retreat that pours at 8 PM and runs Bufo the next morning is working inside the window, not outside it.
Run the numbers. Medicine at 8 PM on a ceremony night. ICEERS’s floor is 24 hours, which puts you at 8 PM the following evening. A Bufo session at 9 AM the next morning is 13 hours. Midday is 16. Neither one clears it.
To actually clear 24 hours you have to put Bufo on the evening of the next day, which on most schedules is when the next ceremony sits, or surrender a whole day out of a retreat that only has so many days in it. That is an expensive choice, and it is why so few centers make it.
This is the part the comparison articles leave out. Retreats that offer both describe the placement in words rather than hours: the morning after, with a clear day behind it, once you’ve rested. Words don’t have a number in them.
So ask for the number. 5 questions, in this order:
- How many hours pass between the last ayahuasca dose and the Bufo session?
- Whose recommendation are you following on that interval, and what does it actually say?
- Synthetic 5-MeO-DMT or toad secretion, and what is the dose in milligrams?
- Who screens for Bufo separately, and what is on the automatic no list?
- How many people are in the room, and what happens if someone stops breathing?
If the answer to the first one is a time of day rather than a number of hours, you already have your answer.
Is Bufo an ancient Indigenous tradition?
No. The practice of smoking toad secretion is about 40 years old, and the retreats selling it as ancient are wrong about the first thing they tell you.
The paper the field cites is Davis and Weil’s 1994 study in the Journal of Ethnopharmacology, and the practice it documents is recent. The thread most people can actually trace runs back to a pamphlet called Bufo alvarius: The Psychedelic Toad of the Sonoran Desert, published by Albert Most in 1985.
People point to toad imagery in Mesoamerican art as proof of deeper roots. There’s a problem with that. Incilius alvarius lives in southern Arizona, Sonora, northern Sinaloa, and the edges of southeastern California and Baja California. The art usually offered as evidence was made hundreds of miles outside that range, and a carving of a toad is not a record of anyone inhaling one.
None of this makes the practice worthless. It makes it a modern one, which has to justify itself on what it does rather than on borrowed lineage. Our own lineage claim is narrow for the same reason: Don Julio learned vegetalismo in the Chujandama family line in Lamas, San Martin, and we hold it in an Andean Quechua container at 2,900 meters. That’s a sentence we can defend. “Thousands of years of toad medicine” is not.
The toad is not endangered, and that’s not the argument anyway
Both sides of the conservation fight are overstating it. AmphibiaWeb lists it as Least Concern on the IUCN Red List, which is not what you’d guess from the way the topic gets discussed.
The same species account records the rest of it. Collecting by certain groups is a threat to populations in some areas. Populations along the Colorado River in California are severely depleted. California lists the animal as a State Species of Special Concern. So the toad isn’t disappearing, and harvesting it is still a real local pressure on a real animal.
Here’s the part that gets lost. The strongest argument for synthetic 5-MeO-DMT has nothing to do with the toad. It’s dose. Secretion varies animal to animal, season to season, and milking to milking, and nobody collecting it in a field is measuring anything. Synthetic 5-MeO-DMT is a known number of milligrams. When a few milligrams separate a manageable dose from an overdose, “we don’t really know how much is in this” is a supply problem dressed up as a spiritual one.
That is an observation from reading the field, not a published finding. Treat it as our opinion with the reasoning attached.
Which is safer, ayahuasca or Bufo?
Neither is safe without a physician reading your file first, and they fail in different directions. Ayahuasca’s problem is drug interactions over a long night. Bufo’s problem is that it’s over before anyone can do much about it.
Dr. Carlos Medina Vargas reads every application we receive before any money changes hands. We reject 13% of applicants outright. Another 4 to 6% get a conditional yes and never meet the conditions, so roughly 17 to 19% of people who apply never sit in our maloca. The automatic no list runs: bipolar I, psychosis history, current lithium, current pharmaceutical MAOIs, uncontrolled cardiac conditions, uncontrolled hypertension, severe pulmonary conditions and pregnancy. SSRIs need a 6 week taper, 8 weeks for fluoxetine, supervised by your own prescriber. Our full screening before acceptance process is published, disqualifiers included.
Now hold Bufo against that. A 13 minute experience with a 1 to 50 second onset leaves almost no window for anyone to intervene. There is no talking someone down, no slowing it, no second opinion at minute 4. Whatever the dose turns out to have been, you are going to find out all of it at once. That is an argument for very careful screening and a measured dose, which is the opposite of how most toad ceremonies are run.
If you want the honest comparison on intensity rather than safety, we wrote separately about the sense of being taken apart and what the research says it does and doesn’t predict.
Is Bufo legal in 2026?
In the United States, no. 5-MeO-DMT has been a Schedule I controlled substance since 19 January 2011.
The DEA placed it there by final rule published in the Federal Register, volume 75, number 243, under docket DEA-331F. The rule puts 5-MeO-DMT into Schedule I along with its salts and isomers. The toad itself isn’t a controlled substance. The chemical in its secretion is, and so is anything you extract from it.
Outside the US it varies, and “legal gray area” is doing a lot of work in most articles on this. Most Bufo retreats operate in Mexico and every one of them will tell you it’s legal there. Ask which statute says so. Check the law of the country you’re flying to rather than the marketing of the center you’re flying for.
Why we won’t serve Bufo
Don Julio decided it, the same way he decided about San Pedro, and the reasoning is about sequencing rather than about the medicine itself.
His line on multi-medicine weeks: mixing ayahuasca, San Pedro, kambo and bufo in one retreat is like having 6 doctors prescribe treatment at the same time without talking to each other. Each one is defensible alone. Together they’re guesswork.
The operator’s version is scheduling. We run 4 ceremonies over 12 days, on nights 4, 6, 9 and 11, with 2 acclimatization days before the first one because the body needs 48 to 72 hours to start adjusting to 2,900 meters. Look for a clean 24 hour gap in that schedule that isn’t already carrying a job. There isn’t one. To add Bufo properly we’d have to drop a ceremony, and nobody comes here for 3.
There’s a second cost that’s harder to see at booking. Take 2 different medicines in one week and something shifts in you, and you don’t know which one did it. Neither do we. We’ve been collecting outcome data since 2020, and a mixed week makes a data point you can’t use.
San Pedro grows on our own land at 2,900 meters and we’ve never poured a cup of it. The reasoning there is the same, and we set it out in full in ayahuasca vs San Pedro. You can also read about who sits with you and how long each of them has been doing this.
What to do if you still want both
Do them months apart, at different centers, with a gap you can state in days rather than in feelings.
Not in one week, not in one retreat, and not on a sequence somebody else already decided for you and described in adjectives.
And if you’re drawn to Bufo because ayahuasca sounds like too many hours, that’s worth sitting with. The hours are not an obstacle to the work. For a lot of people they are the work. Ayahuasca vs Bufo looks like a choice between 2 doors, and most of the time it’s really a question about how much of yourself you want to be present for.
If ayahuasca is what you’re after, the next step isn’t booking. Apply for screening and let the physician read your file first. If he says no, you get the reason in writing and you aren’t charged.
Frequently asked questions
Is Bufo the same as ayahuasca?
No. Ayahuasca is an Amazonian brew of Banisteriopsis caapi vine and a DMT-bearing leaf, drunk at night over 4 to 6 hours. Bufo is 5-MeO-DMT from the secretion of the Sonoran Desert toad, vaporized and inhaled, and it is over in under 20 minutes. They contain different molecules and come from different continents.
Ayahuasca vs Bufo: which one lasts longer?
Ayahuasca, by roughly 20 to 1. A 2021 phase 1 trial in Frontiers in Pharmacology timed vaporized 5-MeO-DMT at a mean of 13.5 minutes by investigator observation and 17.7 minutes by self-report, with onset in 1 to 50 seconds. Ayahuasca runs 4 to 6 hours inside a ceremony that opens at 8 PM and closes around 3 AM.
How long do you have to wait between ayahuasca and Bufo?
ICEERS recommends at least 24 hours after drinking ayahuasca before inhaling Bufo, because harmala alkaloids stay in the blood for up to a day and inhibit the enzyme that clears 5-MeO-DMT. A retreat that pours at 8 PM and runs Bufo the next morning is leaving about 13 hours, not 24. Ask for the interval in hours.
Ayahuasca vs Bufo: which is safer?
Neither is safe without a physician screening you first, and they fail differently. Ayahuasca’s risk is drug interactions across a long night. Bufo’s is that a 13 minute experience with a 1 to 50 second onset leaves almost no room to intervene. We reject 13% of applicants outright and roughly 17 to 19% never attend.
Is Bufo an ancient Indigenous tradition?
No. There is no documented tradition of smoking Incilius alvarius secretion, and the modern practice traces to a pamphlet Albert Most published in 1985, about 40 years ago. Toad imagery in Mesoamerican art is often offered as evidence, but that art was made far outside the toad’s range in Arizona, Sonora and northern Sinaloa.
Is Bufo the same as kambo?
No. Bufo is 5-MeO-DMT from a toad and it is psychedelic. Kambo is a secretion from the giant monkey frog, applied to small burns on the skin, and it isn’t psychedelic at all. People confuse them because both come from an amphibian. We serve neither.
Does Cusco Ayahuasca Retreats offer Bufo?
No. We serve ayahuasca only, plus hape, sananga and plant baths. Don Julio Quispe Condori, our lead healer and a 35% owner of the center, decided against multi-medicine weeks before we opened, and our 4 ceremonies sit on nights 4, 6, 9 and 11 of 12 days with no 24 hour gap to spare.