Iowaska is ayahuasca—the same brew made from the same plants, just spelled differently. People often write “iowaska” because that’s roughly how the word sounds when spoken. So if that’s what you searched for, you didn’t make a mistake. You simply wrote down what you heard.
The spelling is phonetic, but the medicine is the same. The brew is a tea made by cooking the Banisteriopsis caapi vine with a leaf, most often chacruna. There is no separate substance called iowaska, nor is it a weaker or stronger version of ayahuasca.
We’ve been running retreats near Medellín for more than five years, and this question comes up on calls all the time. You’re in the right place, and the word you typed is perfectly fine.
Before you go looking for a ceremony anywhere, talk it through with somebody who runs them. That is what the call is for:
Why People Write It "Iowaska"
The spelling comes from the sound and not from the language. In Quechua it is ayawaska, and in Spanish it is written ayahuasca and said roughly "aya-WAH-ska." An English speaker hearing that for the first time, with no written word in front of them, will very often write iowaska. It can also be that they saw it spelled like this in a forum, and it can also be that a friend wrote it in a message and it stuck. And by the time they come to search for it, that is the version they are carrying.
You also see ayahuaska, aioaska, ayawaska, iawaska. All of them are people writing down a sound. None of them is a different drink, and none of them tells you anything about what is in the cup.
I feel like this matters for one practical reason. If you keep on searching only with the phonetic spelling you get a thinner and stranger internet: fewer medical sources, fewer real centres, more of the loud end of things. So search the standard spelling too, once you know it. You get a better level of information that way.
What Iowaska Is
Iowaska is a brew of two plants that only work together. The vine, Banisteriopsis caapi, carries MAO-inhibiting alkaloids. The leaf, usually Psychotria viridis (chacruna), carries DMT. Swallowed on its own, the DMT in that leaf is broken down in your gut before it reaches anything at all. The vine is what stops that happening. That is the whole mechanism, and it is also why nobody drinks just the leaf.
It is cooked rather than brewed. Hours of it, often a full day, reducing the water down. What you drink is dark and thick and bitter, and there is no version of it that tastes good. Anybody telling you otherwise is selling something.
The plants, the pharmacology and the traditions carrying it are covered at greater length in what ayahuasca is.
Is Iowaska Illegal?
In the United States, yes. The brew contains DMT, a Schedule I controlled substance under the Controlled Substances Act. No state has legalised it. A retreat you find advertised in Florida or California is not operating under a state exemption, because no state exemption exists anywhere.
One state has gone further than the rest. Colorado’s Natural Medicine Health Act (Proposition 122) names DMT and removed criminal penalties for personal possession and non-commercial sharing by adults over 21. That is decriminalisation and not legalisation, it does not permit anybody to run ceremonies for money, and it changes nothing federally.
There are also narrow federal religious protections. The União do Vegetal and certain Santo Daime congregations won the right to use the brew in ceremony through the federal courts. Those rulings cover those congregations. They do not cover a retreat that opens next month and calls itself a church. The detail is at where ayahuasca stands legally in the US, and how the church exemption works, including how to tell a real one from a story.
Elsewhere it is different. In Peru, traditional use is recognised as national cultural heritage. In Colombia, where we are, yagé is not a scheduled substance and traditional practice is constitutionally recognised. That is a large part of why serious retreats sit where they sit. The country-by-country picture is on ayahuasca and the law.
What an Iowaska Ceremony Looks Like
A ceremony is a long night in a dark room with people who are working. It usually starts after dark. You sit or lie on a mat, there is a bucket next to you, and there is a facilitator awake and sober the whole time. The medicine gets poured, you drink, and then you wait, sometimes an hour, and something starts to move.
There is singing, the icaros, and there is silence, and both are used on purpose. There is also a lot of vomiting, which sounds like a failure and is not. The purge is part of the thing and most people feel better on the other side of it. And there is the part nobody can describe for you in advance, which is what happens when the lid comes off and you meet what you have been carrying around.
Two types of people come to this. The first has a life that is basically intact and wants to see something more clearly. The second is in real crisis. The same night lands very differently on those two, and any container worth sitting in will have asked you which one you are long before you arrive. We go through the night hour by hour on what to expect in an ayahuasca ceremony.
How Long an Iowaska Trip Lasts
The acute part runs about four to six hours, and the ceremony night runs longer than that. Onset is usually 20 to 60 minutes after drinking. The strongest stretch tends to sit in the first two or three hours. Then it comes down slowly, and most people are landed and quiet before morning.
That is the pharmacology. The lived answer is longer. The days afterwards stay soft and open and are sometimes hard, and the real work sits in the weeks after rather than in the night itself. We break timing and dose down on ayahuasca dosage and duration.
What Iowaska Costs
A serious multi-day retreat generally runs between roughly 700 and 3,000 US dollars, based on what we see across the centres we track as of 2026, and it moves with the country, the length and what is included. Colombia and Peru sit at the bottom of that range, where operating costs are low and nobody is pricing in legal risk. North America and Europe sit at the top, for the opposite reason.
Price on its own tells you very little, and the low end of the range is a Colombian cost base rather than a warning. What tells you something is what a price includes. A cheap retreat that skips the medical intake and runs one facilitator to a full room is a problem. A cheap retreat in a country where rent and wages are low is just arithmetic. Ask who will be in the room with you, how many of them stay sober through the night, and what happens if it goes badly. Our breakdown by country is on how much an ayahuasca retreat costs.
Who Should Not Drink Iowaska
Some people should not drink this, and that list is not negotiable. Pregnancy and breastfeeding are a hard no. A personal or family history of psychosis, schizophrenia or bipolar disorder is a hard no. Serious heart conditions, epilepsy or a seizure disorder, and significant liver disease are all a hard no.
Then there is the medication question, which is where people actually get hurt. The MAO-inhibiting alkaloids in the vine interact with a long list: SSRIs, SNRIs, MAOIs, lithium, tramadol and other serotonergic opioids, stimulants and ADHD medication, triptans for migraine, dextromethorphan in ordinary cough medicine, St John’s Wort, 5-HTP. That list is not exhaustive, which is the important part. People read a short list, do not see their own medication on it, and conclude they are fine. Tapering anything is a decision you make with your doctor over weeks. The fortnight before a flight is far too late to start it.
There is also the softer version of no, which is timing. Somebody in acute crisis, somebody who has just lost a person, somebody hoping the ceremony will do the work instead of them. That is not a permanent no, it is a not-yet. We turn people away for this and it is one of the more useful things we do. The full list is on who should not do ayahuasca.
What to Do With This
Iowaska is ayahuasca, it is illegal in the United States, it is not scheduled where we work, and it is a long night that asks a lot of you.
The harder part sits underneath the search. People rarely type this word out of curiosity. Usually something is not working, and this came up somewhere, and there is a level of hope attached to it. I would say keep the hope and drop the expectation that the medicine does the work for you. It is a conversation you are having with yourself in an extraordinary state, and afterwards the actions are yours. Ceremony without homework very rarely changes a life.
If you are somewhere in that, talk to somebody who runs these rooms before you book anything anywhere. All the best on your path.
FAQs
Is Iowaska illegal in the US?
Yes. Iowaska, meaning ayahuasca, is illegal under US federal law because it contains DMT, a Schedule I controlled substance. No state has legalised it. Colorado has decriminalised personal possession of DMT-containing plants for adults over 21 under its Natural Medicine Health Act, which is not the same thing and does not permit ceremonies for payment. Narrow federal religious protections exist for specific congregations such as the União do Vegetal, won in court, and they do not extend to the public. See ayahuasca and US law.
Is iowaska the same as ayahuasca?
Yes, exactly the same. Iowaska is a phonetic spelling of ayahuasca, written the way the word sounds. There is no separate substance and no weaker or stronger version. You will also see ayahuaska, ayawaska and aioaska, and all of them refer to the same brew of the caapi vine and a DMT-containing leaf.
How do people do Iowaska?
In a ceremony, at night, with a facilitator awake and sober. You drink a measured cup, wait 20 to 60 minutes for onset, and stay on a mat for the next four to six hours with a bucket beside you. There is singing and there is silence. Drinking it alone, with no screening and nobody sober in the room, is where people get hurt.
How much does an iowaska trip cost?
Roughly 700 to 3,000 US dollars for a serious multi-day retreat, based on what we see across the centres we track as of 2026, varying with country, length and inclusions. Colombia and Peru sit at the bottom of that range on local cost base rather than on corners cut, and our own retreats sit there. Price alone is a weak signal, and what it includes is the thing to ask about. See ayahuasca retreat cost.
What drug is similar to iowaska?
The closest relatives are other DMT-containing preparations. The experience gets compared with psilocybin mushrooms, which run a similar length but feel different in character, and with bufo (5-MeO-DMT), which is far shorter and far more overwhelming. We compare them on ayahuasca vs magic mushrooms and ayahuasca vs bufo.
How long does iowaska last?
Four to six hours for the acute effects, with onset 20 to 60 minutes after drinking and the strongest stretch usually in the first two or three hours. The ceremony night runs longer than the pharmacology does, and the days afterwards stay soft and open. See ayahuasca dosage and duration.
Oliver
