Ayahuasca Contraindications: Who Should Not Take Ayahuasca?
Ayahuasca can produce intense physical, emotional, and psychological effects. Although research suggests that it may have an acceptable safety profile for carefully screened healthy adults in controlled settings, it is not safe or appropriate for everyone.
Certain medical conditions, mental health histories, medications, recreational drugs, pregnancy, and other risk factors may significantly increase the possibility of a serious adverse reaction.
This guide explains the principal ayahuasca contraindications and why honest medical screening is essential before participating in a ceremony.
Medical disclaimer: This article provides general educational information and is not a substitute for medical advice. Never discontinue medication or change its dosage to attend an ayahuasca ceremony without consulting the prescribing healthcare professional.
Who Should Not Take Ayahuasca?
Ayahuasca should generally be avoided by people who:
Take medications that affect serotonin or monoamine oxidase.
Have schizophrenia, psychosis, mania, or certain bipolar-spectrum conditions.
Have serious or uncontrolled cardiovascular disease.
Are pregnant or breastfeeding.
Have a history of seizures or certain neurological conditions.
Have serious liver disease or another unstable medical condition.
Are intoxicated or withdrawing from alcohol or drugs.
Cannot provide informed consent or participate safely in the ceremony.
Some situations require an individualized medical assessment rather than an automatic rejection. A responsible retreat should review every participant’s health history before accepting a reservation.
Why Can Ayahuasca Interact With Medications?
Traditional ayahuasca usually combines a DMT-containing plant with the Banisteriopsis caapi vine. The vine contains beta-carboline alkaloids that temporarily inhibit monoamine oxidase, particularly MAO-A.
This mechanism allows orally consumed DMT to become active. However, it can also alter how the body processes serotonin and other neurotransmitters.
Combining ayahuasca with certain medications or substances may create dangerous interactions, including excessive serotonin activity, changes in blood pressure, abnormal heart rate, agitation, hyperthermia, or other toxic reactions.
A scientific review identified serotonergic medication use, as well as pre-existing cardiac and liver disease, as important contraindication concerns. Other research also emphasizes that evidence about many ayahuasca–medication interactions remains incomplete.
Antidepressants and Ayahuasca
People taking antidepressants must disclose them during screening. Medications of concern may include:
Selective serotonin reuptake inhibitors, or SSRIs.
Serotonin–norepinephrine reuptake inhibitors, or SNRIs.
Monoamine oxidase inhibitors, or MAOIs.
Tricyclic antidepressants.
Other antidepressants that substantially affect serotonin.
Combining serotonergic medication with ayahuasca may increase the risk of serotonin toxicity, also known as serotonin syndrome. This is a potentially serious medical reaction caused by excessive serotonergic activity.
Possible symptoms include:
Agitation or confusion.
Heavy sweating.
Tremors or muscle rigidity.
Diarrhea.
Rapid heart rate.
High body temperature.
Changes in blood pressure.
Seizures or loss of consciousness in severe cases.
Not every antidepressant carries the same risk, and stopping medication can itself be dangerous. Withdrawal, relapse, mood destabilization, and suicidal symptoms are possible when psychiatric medication is discontinued incorrectly.
Do not stop antidepressants independently to attend a retreat. The decision must be discussed with the prescribing professional, who understands the medication, dosage, treatment history, and individual risks.
Other Medications and Substances of Concern
Ayahuasca may also interact with other prescription drugs, over-the-counter products, supplements, or recreational substances.
These may include:
Stimulant medications.
Certain migraine medicines, including some triptans.
Some cough medicines containing dextromethorphan.
Certain pain medicines with serotonergic activity.
Other MAO inhibitors.
Serotonergic supplements such as 5-HTP or St. John’s wort.
MDMA and other stimulants.
Cocaine or amphetamines.
Other psychedelics or psychoactive substances.
Products containing 5-MeO-DMT.
This is not a complete interaction list. Brand names and formulations vary between countries, and some medications contain multiple active ingredients.
Participants should provide the retreat’s medical screener with the exact names and dosages of every medication, supplement, and substance they use.
Psychosis and Schizophrenia
People with schizophrenia, schizoaffective disorder, a history of psychosis, or current psychotic symptoms should not participate in an ayahuasca ceremony.
Ayahuasca can temporarily produce major changes in perception, thought, emotional processing, and sense of identity. For someone vulnerable to psychosis, these effects may contribute to a psychotic episode or worsen an existing condition.
A personal history is particularly important, but family history may also matter. Research examining reported psychedelic-related psychotic episodes has identified previous psychiatric symptoms, a family history of psychosis, and concurrent substance use as recurring risk factors.
Anyone with a close family history of schizophrenia or another psychotic disorder should receive a qualified mental health assessment before considering ayahuasca.
Bipolar Disorder and Mania
Ayahuasca is generally unsuitable for people with bipolar I disorder or a history of manic episodes.
Case reports and psychiatric reviews have raised concerns that ayahuasca and other serotonergic psychedelics may trigger mania, hypomania, or prolonged mood instability in susceptible individuals.
Warning signs of mania can include:
Abnormally elevated or irritable mood.
Very little need for sleep.
Racing thoughts.
Excessive energy.
Impulsive or dangerous behavior.
Grandiose beliefs.
Psychotic symptoms.
People with suspected bipolar disorder, previous mania, or a strong family history of bipolar I disorder should obtain a specialist assessment. Feeling emotionally well at the time of booking does not eliminate the underlying risk.
Severe Depression and Suicidal Crisis
Research is investigating ayahuasca’s possible effects on depression, but this does not make an informal ceremony an established medical treatment.
A person experiencing an acute suicidal crisis, severe emotional instability, recent self-harm, or an inability to maintain personal safety requires appropriate clinical support. A retreat is not a replacement for emergency psychiatric care.
Anyone with depression should disclose the diagnosis, current symptoms, previous hospitalizations, suicidal history, and medication use during screening.
Heart Disease and High Blood Pressure
Ayahuasca can temporarily increase heart rate and blood pressure. This may present additional risks for people with:
Coronary artery disease.
Previous heart attack or stroke.
Serious heart rhythm disorders.
Uncontrolled hypertension.
Heart failure.
Other significant cardiovascular conditions.
Clinical trials frequently screen out people with cardiovascular disease. Therefore, findings showing relative safety among healthy volunteers cannot automatically be applied to individuals with serious heart conditions.
Medical clearance may be necessary when there is any cardiovascular history.
Seizures and Neurological Conditions
Seizures have been reported among serious adverse events following ayahuasca use, although circumstances and contributing substances are not always clear.
People with epilepsy, unexplained seizures, previous serious brain injury, or another neurological condition should not participate without explicit assessment and approval from a qualified medical professional.
Anti-seizure medication must also be reviewed for possible interactions. It should never be stopped simply to meet a retreat requirement.
Liver Disease and Other Medical Conditions
The liver plays an important role in processing medicines and ayahuasca compounds. Serious liver disease could alter this process and increase risk.
Additional caution or exclusion may be appropriate for people with:
Advanced liver disease.
Serious kidney disease.
Uncontrolled endocrine or metabolic conditions.
Glaucoma.
Fever or acute infection.
A recent major operation.
Any unstable or poorly controlled medical illness.
The correct decision depends on the diagnosis, severity, current treatment, and the participant’s overall health.
Pregnancy and Breastfeeding
Pregnant and breastfeeding individuals should not take ayahuasca.
There is not enough high-quality clinical evidence to establish its safety during pregnancy or breastfeeding. Its psychoactive effects, physiological changes, uncertain composition, and potential transfer of active compounds create unnecessary risks for both parent and child.
The absence of documented harm in some traditional settings is not evidence that ayahuasca is safe during pregnancy.
Children and Adolescents
Ayahuasca should not be offered to minors in a commercial retreat setting.
Children and adolescents are still undergoing neurological and psychological development. They cannot be assumed to have the same safety profile as screened adults, and research is insufficient to establish appropriate clinical standards.
Alcohol, Recreational Drugs, and Withdrawal
Ayahuasca should not be combined with alcohol or recreational drugs.
Participants must also disclose substance dependence and recent use honestly. Alcohol, benzodiazepine, or other drug withdrawal can produce severe medical complications and must be managed professionally.
A person should not arrive at a ceremony intoxicated, experiencing withdrawal, or attempting to use ayahuasca as an unsupervised detoxification method.
Can You Stop Medication Before Taking Ayahuasca?
You should never stop medication based solely on information from a retreat, facilitator, website, friend, or online forum.
Some medications require gradual tapering under medical supervision. Stopping them suddenly may cause withdrawal symptoms, recurrence of the original condition, seizures, mood destabilization, or other complications.
There is no universal “washout period.” It depends on factors such as
The medication and its half-life.
Dosage and duration of treatment.
Other medications being taken.
Physical and psychiatric history.
The reason the medication was prescribed.
Individual metabolism.
Only the prescribing healthcare professional can determine whether discontinuation is medically appropriate.
What Should a Responsible Retreat Screen For?
A responsible ayahuasca retreat should request information about:
Current and previous medical conditions.
Mental health diagnoses and symptoms.
Personal and family history of psychosis or bipolar disorder.
Prescription and non-prescription medications.
Supplements and herbal products.
Alcohol and recreational drug use.
Previous seizures or neurological problems.
Cardiovascular history and blood pressure.
Pregnancy or breastfeeding.
Previous psychedelic experiences and adverse reactions.
Screening should happen before payment and travel whenever possible. The retreat should also have clear emergency procedures, trained support, sober supervision, and access to professional medical assistance.
A facilitator who encourages someone to hide a diagnosis, discontinue medication independently, or ignore a doctor’s advice is a serious warning sign.
When Should Someone Seek Emergency Help?
Urgent medical assistance is needed if someone develops symptoms such as:
Chest pain.
Difficulty breathing.
Seizure.
Fainting or loss of consciousness.
Very high body temperature.
Severe agitation or confusion.
Muscle rigidity.
Persistent irregular heartbeat.
Dangerous behavior or psychosis.
Suicidal thoughts or inability to remain safe.
These symptoms should not be dismissed as a normal “purge,” spiritual process, or difficult ceremony.
Final Considerations
Ayahuasca is not appropriate for everyone. Its safety depends on much more than the brew itself: medical screening, medication interactions, psychiatric history, preparation, dosage, supervision, setting, and emergency readiness all matter.
People with cardiovascular disease, psychosis, schizophrenia, bipolar I disorder, seizure disorders, pregnancy, serious liver disease, or potentially dangerous medication interactions should generally avoid ayahuasca unless appropriately evaluated by qualified healthcare professionals.
Honest screening is not an obstacle to the experience. It is one of the most important ways to protect participants, facilitators, and the wider community.
Before considering a ceremony, learn more about ayahuasca safety, ayahuasca risks, and proper ayahuasca preparation.
Frequently Asked Questions
Who should absolutely avoid ayahuasca?
People with psychotic disorders, a history of mania, serious or uncontrolled cardiovascular disease, pregnancy, or potentially dangerous medication interactions should generally avoid it. Individual medical assessment remains essential.
Can I take ayahuasca while using antidepressants?
Combining ayahuasca with serotonergic antidepressants may cause serious interactions. Do not combine them or discontinue medication without guidance from the prescribing healthcare professional.
Is ayahuasca safe for someone with anxiety or depression?
A diagnosis does not automatically determine suitability. Severity, medication use, suicidality, bipolar vulnerability, previous episodes, and current stability must be assessed individually.
Can people with high blood pressure take ayahuasca?
Ayahuasca may temporarily increase blood pressure and heart rate. Uncontrolled hypertension is an important contraindication. A healthcare professional should evaluate any cardiovascular risk.
Is ayahuasca safe during pregnancy?
No reliable evidence establishes its safety during pregnancy or breastfeeding. Avoiding ayahuasca is the safest recommendation.
Why is medical screening necessary?
Screening identifies medication interactions, medical conditions, psychiatric vulnerabilities, and other factors that could make an ayahuasca ceremony unsafe.