Traditional Preparations vs Isolated Compounds and Clinical Products
Why a traditional plant preparation, an isolated compound and a clinical product are three different things, using ayahuasca, iboga, Salvia divinorum and San Pedro as examples.
Content last updated . This page has not been medically reviewed.
Why this matters for safety. A result for one of these things cannot be assumed for the others. A case report shows what can happen when ayahuasca, which contains MAO-blocking compounds, meets common cold and allergy medicines: severe serotonin syndrome needing intensive care. [1] The interaction concerns the brew's MAO-blocking compounds, so it is not a finding about DMT alone.
Three different things
- Traditional preparation. A plant or mix of plants used within a particular people's practice, with its own meaning, rules and community. Examples: ayahuasca, iboga as used in the Bwiti tradition, San Pedro in Andean healing traditions.
- Isolated compound. One chemical taken out of the plant, such as DMT, ibogaine, salvinorin A or mescaline.
- Clinical product. A specific product given in a study or by a regulator under defined conditions. Evidence from a trial applies to that product, population and setting only.
An isolated compound is not the cultural practice. A tradition is not clinical evidence. A clinical trial does not validate unregulated products sold under the same plant name. See cultural description vs clinical endorsement.
How the three differ, by example
| Plant or tradition | Preparation | Isolated compound(s) | What changes between them |
|---|---|---|---|
| Ayahuasca | A brew from Banisteriopsis caapi and Psychotria viridis leaves, used in Amazonian and Brazilian religious settings [2][3] | DMT, harmine | Harmine blocks the enzyme that breaks down DMT, so the two work together in the brew. [4] |
| Iboga | Root bark used in the Bwiti tradition [5] | Ibogaine and noribogaine | Ibogaine is linked to deaths and long QT syndrome. [6][7] Those findings concern ibogaine, not Bwiti practice. |
| Salvia divinorum | Plant used by the Mazatec for divination and spiritual healing [8] | Salvinorin A | Most pharmacology research focuses on salvinorin A in animal models. [9] |
| San Pedro and related cacti | Used in Andean healing traditions [10] | Mescaline | A laboratory study found large differences in mescaline content between specimens of 14 varieties. [11] |
Why trial results do not transfer
- Different mixtures. Reviews note that brews made with substitute plants or with extracted or synthetic alkaloids are not the traditional preparation. [12][13]
- One trial, one product. The ayahuasca depression trial studied a single dose in 29 people with treatment-resistant depression and followed them for seven days. [14] The ibogaine study of veterans was open-label with 30 people, gave ibogaine with magnesium, and cannot show that ibogaine is safe or effective. [15]
- Variable content. A laboratory study of 14 cactus varieties found large differences in mescaline content, and such a result covers only the specimens tested. [11] NIDA also warns that contaminants or other substances can alter effects. [7]
- Setting. In the Global Ayahuasca Survey, physical adverse effects were linked to non-supervised use and mental health effects were negatively associated with religious settings, but this is an online, self-selected survey and cannot prove cause. [16]
- Few controlled studies. A 2024 review says controlled ayahuasca studies are few, small, single-dose and short. [2]
Respect, consent and ownership
Indigenous-led authors raise concerns about appropriation, patents and the exclusion of Indigenous people from Western psychedelic research. [17] Another paper argues that benefit-sharing is required when isolated compounds derive from traditional knowledge, and that medicalization without respect for Indigenous rights can harm the people and the plants. [18] See Indigenous traditions, ethics and conservation.Takeaway
There is no universal winner. Preparations, compounds and clinical products answer different questions: cultural meaning, chemistry and tested effects. Check which one a claim is about. For practical comparisons see DMT vs ayahuasca and iboga vs ibogaine, and for the traditional guides see ayahuasca and iboga and Bwiti traditions.Frequently asked questions
Why is ayahuasca not the same as DMT?
Ayahuasca is a brew of more than one plant, and its harmine blocks the enzyme that would otherwise break DMT down. [4]
If a trial worked for a compound, does the traditional plant work too?
Not necessarily. Results apply only to the product, dose, population and setting studied. [14]
Does a long tradition prove a treatment works?
No. A tradition is cultural and religious; it is not clinical evidence. A critical review of severe-reaction reports on ayahuasca found that some cases were not relevant to traditional preparations, which shows why preparations must be kept apart. [12]
Why do the studies differ?
They use different substances, samples, designs and follow-up, so their results are not interchangeable. [2]
References
- Pack S et al., Cureus 2026, Severe Serotonin Syndrome With Acute Respiratory Failure Following Ayahuasca and Dextromethorphan Use: A Case Report. Read 2026-10-22.
- Dos Santos RG et al., CNS Spectr 2024, Ayahuasca: pharmacology, safety, and therapeutic effects. Read 2026-10-22.
- Hamill J et al., Curr Neuropharmacol 2019, Ayahuasca: Psychological and Physiologic Effects, Pharmacology and Potential Uses in Addiction and Mental Illness. Read 2026-10-22.
- Wittayakarn N et al., Toxicol Sci 2025, Development of a physiologically based pharmacokinetic model of N,N-dimethyltryptamine, harmine, and their interactions from ayahuasca in rats and humans. Read 2026-10-22.
- UK Government, Iboga (Tabernanthe iboga), research for development output. Read 2026-10-22.
- Litjens RP et al., Clin Toxicol (Phila) 2016, How toxic is ibogaine?. Read 2026-10-22.
- National Institute on Drug Abuse, Psychedelic and Dissociative Drugs. Read 2026-10-22.
- Zawilska JB et al., Hum Psychopharmacol 2013, Salvia divinorum: from Mazatec medicinal and hallucinogenic plant to emerging recreational drug. Read 2026-10-22.
- Casselman I et al., J Ethnopharmacol 2014, From local to global-fifty years of research on Salvia divinorum. Read 2026-10-22.
- Carod-Artal FJ et al., Rev Neurol 2006, [[Mescaline and the San Pedro cactus ritual: archaeological and ethnographic evidence in northern Peru]](https://pubmed.ncbi.nlm.nih.gov/16625512/). Read 2026-10-22.
- Ogunbodede O et al., J Ethnopharmacol 2010, New mescaline concentrations from 14 taxa/cultivars of Echinopsis spp. (Cactaceae) ("San Pedro") and their relevance to shamanic practice. Read 2026-10-22.
- dos Santos RG et al., J Psychoactive Drugs 2013, A critical evaluation of reports associating ayahuasca with life-threatening adverse reactions. Read 2026-10-22.
- Brierley DI et al., Prog Neuropsychopharmacol Biol Psychiatry 2012, Developments in harmine pharmacology--implications for ayahuasca use and drug-dependence treatment. Read 2026-10-22.
- Palhano-Fontes F et al., Psychol Med 2019, Rapid antidepressant effects of the psychedelic ayahuasca in treatment-resistant depression: a randomized placebo-controlled trial. Read 2026-10-22.
- Cherian KN et al., Nat Med 2024, Magnesium-ibogaine therapy in veterans with traumatic brain injuries. Read 2026-10-22.
- Bouso JC et al., PLOS Glob Public Health 2022, Adverse effects of ayahuasca: Results from the Global Ayahuasca Survey. Read 2026-10-22.
- Celidwen Y et al., Lancet Reg Health Am 2023, Ethical principles of traditional Indigenous medicine to guide western psychedelic research and practice. Read 2026-10-22.
- Schenberg EE et al., Transcult Psychiatry 2022, Overcoming epistemic injustices in the biomedical study of ayahuasca: Towards ethical and sustainable regulation. Read 2026-10-22.