SectionSafety & Screening
Application turn-down rate~1 in 3
Reading time9 minutes
Last reviewedApril 2026
Reviewed byDr. M. Vélez · Clinical Director

We are careful
with the people
we are careful with.

Plant medicines have absolute and relative contraindications. The screening process is the first place where the work begins. The honesty of your answers here is what keeps the work safe — for you, for your cohort, and for the lineage we work in.

Who we cannot serve

Absolute contraindications.

These are conditions and medications for which the work is not safe and for which we will, kindly and without exception, decline.

The substances used at Life Retreat — DMT (in ayahuasca), mescaline (in San Pedro), and psilocybin — interact with several classes of medication and several psychiatric conditions in ways that are dangerous and, in some cases, life-threatening. The list below is not negotiable.

  • i
    Active psychosis or schizophrenia (personal history) The medicines can trigger or amplify psychotic process. We do not work with active or recent (5-year) histories of psychosis or schizophrenia. If first-degree family history only — see relative contraindications
    Absolute
  • ii
    Bipolar I disorder The mood-stabilising challenge of the work is unsafe for those with manic-depressive cycles. Bipolar II — relative contraindication, requires psychiatric review
    Absolute
  • iii
    MAOIs (monoamine oxidase inhibitors) Ayahuasca itself contains MAOIs. Stacking these is medically dangerous. We require a 3-month wash-out period. Includes: phenelzine, tranylcypromine, isocarboxazid, moclobemide, selegiline
    Absolute
  • iv
    Lithium Combination with serotonergic plant medicines has been linked to seizure and severe adverse outcomes. Non-negotiable.
    Absolute
  • v
    Severe cardiovascular disease Active coronary artery disease, recent (12-month) myocardial infarction, severe arrhythmia, uncontrolled hypertension. The medicines elevate heart rate and blood pressure.
    Absolute
  • vi
    Pregnancy We do not work with pregnant guests. We will gladly hold your place for a future cohort.
    Absolute
Who needs additional review

Relative contraindications.

These conditions and medications are not automatic disqualifications, but require additional review with our physician network.

  • ·
    SSRIs / SNRIs Common antidepressants. We work with you and a prescribing physician on a careful taper schedule before retreat. Typical wash-out: 4—6 weeks for most SSRIs, 2 weeks for fluoxetine. Sertraline, fluoxetine, escitalopram, venlafaxine, duloxetine, paroxetine
    Review
  • ·
    First-degree family history of psychosis A parent, sibling, or child with schizophrenia or bipolar I. Requires a psychiatric consultation before we can proceed.
    Review
  • ·
    Heart conditions (mild to moderate) Controlled hypertension, mitral valve prolapse, mild arrhythmias. Cardiology clearance required.
    Review
  • ·
    Seizure disorders Epilepsy in remission may be acceptable; active epilepsy is not. Neurology clearance required.
    Review
  • ·
    Diabetes (Type 1 and 2) Fasting protocol requires careful glucose management. Endocrinology consultation.
    Review
  • ·
    Recent (5-year) history of severe substance dependence We have worked with many people in recovery. Time and stability of recovery matter; current AA/NA sponsor consultation may be requested.
    Review
The screening process

Four steps, over four to six weeks.

Screening is not a hurdle to clear. It is the first conversation, and the conversation begins by listening.

i

Application form (10 min, online)

Five steps: contact, health, intention, logistics, review. Read by a person, in your language, within 72 hours. We respond either way — including to the applications we cannot accept.

Day 0
ii

90-minute intake call (with senior facilitator)

The first conversation, in your native language. We ask about your medical history, current medications, mental health history, intention, and previous experience with plant medicine. We answer your questions.

Days 7—14
iii

Physician clearance (where applicable)

For SSRI tapering, cardiac conditions, seizure history, diabetes, or other relative contraindications — clearance from a physician familiar with our protocols. We work with networks in Romania, USA, Israel, Germany, and the UK.

Days 14—28
iv

Confirmation & deposit

30% deposit holds your place. Refundable until 60 days before retreat. Pre-arrival materials sent — including the two-week dieta protocol and the field guide.

Days 28—42
A note on saying no

We turn down approximately one in three applicants. Most, kindly. The "no" is part of the work — and we say it for the same reason the medicine itself sometimes says it. Some people are not ready, some times are not the right time, some bodies are not the right vessel. None of those are personal failures. Many of the people we have turned down have come back, two or three years later, and the answer has been yes.

Medication interactions

What you must disclose.

Honesty here is not optional. Undisclosed medications are the single largest preventable cause of harm in plant medicine work.

Class
With ayahuasca / DMT
With psilocybin / mescaline
SSRIs
Caution · serotonin syndrome risk · taper required
Reduced effect · taper recommended
SNRIs
Caution · taper required
Reduced effect · taper recommended
MAOIs
DANGEROUS · 3-month wash-out
DANGEROUS · 3-month wash-out
Lithium
DANGEROUS · seizure risk
DANGEROUS · seizure risk
Benzodiazepines
Reduces medicine effect · 1-week wash-out
Reduces medicine effect
Stimulants (Adderall, etc.)
Caution · cardiovascular load
Caution · cardiovascular load
Cannabis
2-week abstention requested
2-week abstention requested
Tramadol & opioids
DANGEROUS with ayahuasca
Caution

If you are uncertain about a medication or supplement, list it in your application. Our physicians will review it. We have never said no to disclosure — only to non-disclosure.

On-site protocols

What is in place
at the retreat itself.

Everything we do during the ten days, on the safety side. Some of it visible. Most of it not.

Medical staff on premises. A nurse practitioner is on staff for every retreat, in residence at the maloca. Blood pressure, heart rate, and blood oxygen are monitored before each ceremony for every participant.

Emergency protocols. A 4WD vehicle is on site for the duration of every retreat. the regional hospital is 40 minutes by road. Air-evacuation arrangements with a Quito hospital are pre-arranged for severe cases (we have used this protocol three times in eight years; outcomes were good in all three).

Facilitator-to-guest ratio. One facilitator for every six guests during ceremony; one for every ten outside ceremony. All facilitators are S2S-certified, in addition to the lineage training of the curanderas.

Substance preparation. Ayahuasca is prepared on-site, in the lineage of Olinda Pérez Mori, by a curandera who has worked with our retreat for seven years. San Pedro is sourced from a single Andean curandero. Psilocybin mushrooms are cultivated on-site under sterile conditions — we do not use foraged or unverified material.

Daily check-in. Every guest has a one-to-one check-in with a senior facilitator on every non-ceremony morning. The cohort is small enough that no one is unseen.

Diet and hydration. All meals are prepared in the dieta tradition (no salt, no sugar, no oils, no fermented food, no spicy food). Water is filtered and abundant.

What we do not do. We do not lock doors. We do not restrain. We do not medicate participants out of difficult experiences except in the rare case of physical safety. The medicine and the room do the work.

After the retreat

Safety continues
for twelve months.

The work is not over when the medicine leaves. Most of what is dangerous, in this kind of work, happens not during the ceremony — but in the weeks after.

The post-retreat container is itself a safety protocol. Many of the documented adverse events in plant medicine work happen in the 2—8 weeks after a retreat, when participants are unsupported, isolated, or attempting to integrate alone. The S2S 12-month container directly addresses this risk.

Week 1 home check-in. A senior facilitator calls you within 5 days of return. We listen. We answer practical questions. We check the basics: are you sleeping, eating, returning to your relationships, returning to work.

Monthly group calls (12 months). One 90-minute call per month, in your native language, with the cohort you sat with. The calls are not optional — they are part of the container.

One-to-one integration (6 months). Six sessions with a certified S2S integration practitioner. These are clinical conversations, not coaching.

Emergency line. A WhatsApp number, monitored by a senior facilitator, that you can use any time in the first 12 months for support. Used by approximately 8% of participants in the first 60 days, less thereafter.

Re-medication conversations. If you tapered SSRIs for the retreat, the question of whether and when to re-medicate is held with you and your prescribing physician. We do not advocate against medication. We work with what is true for you now.

Safety record

What has and hasn't happened.

The truth, plainly told, since 2018.

Across 9,000+ ceremonies and 800+ guests per year for eight years, here is our safety record:

Zero deaths. Zero ceremony-related fatalities. Zero hospital admissions for substance-related cardiovascular events.

Three air evacuations for non-substance-related medical events (one acute appendicitis, one severe asthmatic episode, one allergic reaction to a non-ceremonial food). All three with good outcomes.

Approximately 12 cases per year of difficult psychological emergence requiring extended one-to-one support during retreat — not crises, but periods of intensive holding. All resolved within the retreat container.

Two cases in eight years of post-retreat psychiatric hospitalization (both with prior undisclosed psychiatric history). Both fully recovered. Both have shifted our screening protocols.

Approximately 1 in 30 guests chooses to pause or skip a ceremony during the ten days. This is honored without question.

We publish this not as marketing but because hidden data is bad for the field. The integrity of plant medicine work depends on transparency about what does and does not happen.

A practical next step

Begin with the application. The screening conversation is the safety conversation.

Most of what we just described — the contraindications, the medication review, the medical clearances — happens in the application and the intake call. Begin there.

Apply for a Retreat