Camalonga
At a Glance
Camalonga is not one plant but a folk name for the toxic seeds of more than one unrelated species, used by Amazonian curanderos for dreaming, divination and protection. It is not a visionary or psychedelic medicine — and it is genuinely poisonous. "Camalonga blanca" is usually the yellow oleander (Cascabela thevetia), whose cardiac glycosides can stop the heart; "camalonga negra" is attributed to Strychnos seeds, which carry strychnine. It is dieted as a powerful, advanced teacher plant — only under an experienced maestro, and even then with real risk. There is no safe dose; this page is descriptive, not a how-to.
| Detail | Information |
|---|---|
| What "camalonga" is | A folk name for the toxic seeds of more than one unrelated plant |
| Usual identity | Blanca = yellow oleander (Cascabela thevetia / Thevetia peruviana); negra = Strychnos spp. |
| Families | Apocynaceae (blanca) · Loganiaceae (negra) — botanically unrelated |
| Active compounds | Cardiac glycosides (blanca) · strychnine & brucine (negra) — both potentially lethal |
| Traditional role | Teacher plant for dreaming, divination and protection — not visionary/psychedelic |
| Key risk | Poisonous: cardiac arrest (blanca) or convulsions (negra). No safe dose; never self-administer (see Safety) |
| Classification | Teacher plant (planta con madre); advanced, maestro-guided only |
A Name for More Than One Plant
"Camalonga" is a shamanic term, not a botanical one. It is applied to the seeds of at least two botanically unrelated, highly toxic plants, and the picture is genuinely muddled. In his classic study of mestizo vegetalismo, Luis Eduardo Luna recorded camalonga as a divinatory plant used by specialists called camalongueros — and left it botanically unidentified, noting only that it was said to grow in the Andes (Luna, 1986). Later authors have matched the name to specific species, but the two-plant split below is best read as folk usage rather than a clean botanical pair (Beyer, 2009).
- Camalonga blanca is generally identified as the yellow oleander, Cascabela thevetia (widely cited under its synonym Thevetia peruviana) — a Neotropical ornamental of the dogbane family.
- Camalonga negra is attributed to Strychnos seeds. These are often loosely equated with the Asian "St. Ignatius bean" (Strychnos ignatii), but that species is native to the Philippines, and its actual use in the Amazon is undocumented — so the most that can be said with confidence is Strychnos at the genus level (Beyer, 2009).
Taxonomy
Camalonga Blanca — Cascabela thevetia (L.) Lippold
| Rank | Taxon |
|---|---|
| Family | Apocynaceae (dogbane family) |
| Genus | Cascabela |
| Species | C. thevetia (L.) Lippold |
| Synonyms | Thevetia peruviana (Pers.) K. Schum.; Cerbera thevetia L. (basionym) |
| Common names | Camalonga blanca, yellow oleander, lucky nut |
Lippold transferred the species from Thevetia to Cascabela in 1980; the older name Thevetia peruviana remains very widely used (POWO, 2024). It is an evergreen shrub or small tree (3–8 m) with glossy linear leaves, funnel-shaped yellow flowers, and a fleshy fruit containing one or two hard-shelled seeds. Native to Mexico, Central America and northern South America, it is now cultivated as an ornamental throughout the tropics (POWO, 2024).
Camalonga Negra — Strychnos spp.
| Rank | Taxon |
|---|---|
| Family | Loganiaceae (sometimes placed in Strychnaceae) |
| Genus | Strychnos (~200 species) |
| Commonly cited species | S. ignatii P.J. Bergius (St. Ignatius bean; syn. Ignatia amara) — Asian, Amazonian use unconfirmed |
| Notable relatives | S. nux-vomica (strychnine tree); S. toxifera (a curare source) |
The genus Strychnos is pantropical and famous for its toxic indole alkaloids; a recent global phylogeny resolved it into twelve strongly supported clades (Setubal et al., 2021). S. ignatii is best known in pharmacology and homeopathy under the synonym Ignatia amara. Because Amazonian "camalonga negra" seeds are rarely tied to a voucher specimen, species-level identification should be treated with caution.
How Camalonga Is Used
Camalonga belongs to the protective, dream-working side of Amazonian plant medicine rather than the visionary side. Within the tradition its spirit is regarded as a stern guardian and a teacher of discipline, and it is engaged as a teacher plant (planta con madre) — in the ethnobotanical record it is grouped with the plants dieted for purification and protection (Jauregui et al., 2011).
The preparation is distinctive. The ethnographer Stephan Beyer documents camalongueros macerating two seeds — designated "male" and "female" — in aguardiente (cane spirit), commonly with camphor and white onion. The seeds are left whole rather than crushed, which is understood in spiritual terms but may also incidentally limit how much toxin is extracted. Only small amounts of the resulting tincture are taken (Beyer, 2009).
Its reported effects are framed around dreaming and divination — lucid, information-rich dreams and heightened perception — and around protection and strengthening. Importantly, camalonga is not visionary in the way ayahuasca is. Neither source plant has a known mechanism for producing psychedelic states; any subjective effects more likely reflect sub-toxic stimulation, the dream-focused ritual context, or expectation. It is approached as an advanced plant, alongside other powerful and demanding teachers — and, like the deliriant toé, it sits among the genuinely dangerous medicines that are never taken casually.
Why Camalonga Is Dangerous
Both candidate plants are genuinely poisonous, by entirely different mechanisms. This is not a plant whose risk is theoretical.
Camalonga blanca — cardiac glycosides
All parts of Cascabela thevetia contain cardenolide-type cardiac glycosides — thevetin A, thevetin B (cerberoside), peruvoside and neriifolin among them — concentrated in the seeds; modern phytochemical work has isolated many more, including rare 19-nor-cardenolides (Tian et al., 2016). These compounds inhibit the heart-muscle sodium–potassium pump (Na⁺/K⁺-ATPase); at toxic doses this causes bradycardia, conduction block and fatal ventricular arrhythmia. As few as 8–10 seeds can be lethal to an adult. Yellow-oleander seed poisoning is a major cause of fatal self-poisoning in parts of South Asia: in one northern Sri Lankan series, around half of those poisoned developed atrioventricular block or bradycardia, with a case-fatality rate of roughly one in ten (Eddleston et al., 1999).
Camalonga negra — strychnine
Strychnos seeds contain the indole alkaloids strychnine and brucine. Strychnine — first isolated from the St. Ignatius bean in 1818 (Pelletier & Caventou, 1818) — is a competitive antagonist at the inhibitory glycine receptors of the spinal cord and brainstem. By removing the normal "braking" of motor neurons it produces reflex hyperexcitability and violent, generalised tonic–clonic convulsions, often triggered by the slightest light, touch or sound, with consciousness preserved until late; death follows from sustained spasm of the respiratory muscles. The estimated lethal oral dose is on the order of 30–120 mg of strychnine (Menza & Lee, 2024). Brucine acts similarly but is markedly weaker.
Safety
- Both source plants can kill. C. thevetia causes fatal cardiac arrhythmia; Strychnos seeds cause fatal convulsions and respiratory arrest. There is no safe dose that can responsibly be given outside supervised traditional practice — and serious harm is possible even within it.
- Absolute contraindications: any cardiac disease, neurological disorder, hepatic or renal impairment, pregnancy, or serious illness. Never combine with other medicines: cardiac glycosides interact dangerously with digoxin, beta-blockers, calcium-channel blockers and diuretics, and convulsant risk rises with anything that lowers the seizure threshold.
- Never self-administer. Camalonga should only ever be approached under a genuinely experienced maestro who understands the preparation and the danger. Vendors selling seeds or tinctures for self-use are offering a poison.
- In an emergency, yellow-oleander poisoning is a medical emergency treated with activated charcoal, atropine, cardiac monitoring/pacing and, where available, digoxin-specific antibody fragments; strychnine poisoning is treated with benzodiazepines, respiratory support and minimisation of sensory stimulation (Eddleston et al., 1999; Menza & Lee, 2024). Seek emergency care immediately.
For the site's wider harm-reduction guidance, see Safety & Harm Reduction.
Legal Status
Cascabela thevetia is not a controlled substance and is freely cultivated as an ornamental. Strychnos plants are generally not scheduled, but strychnine itself is a regulated poison in many jurisdictions, and the commercial sale of strychnine-containing preparations is restricted. Homeopathic Ignatia amara at high dilution remains widely available. Camalonga tinctures sold for consumption occupy a legal grey area that varies by country.
Common Questions
Is camalonga psychedelic like ayahuasca?
No. Camalonga is used for dreaming, divination and protection, not for visions. Neither of its source plants (yellow oleander or Strychnos) has a known mechanism for producing psychedelic states — they are toxic, not hallucinogenic. Any subjective effects likely reflect sub-toxic stimulation or the dream-focused ritual context.
Is camalonga a single plant?
No. "Camalonga" is a folk name for the toxic seeds of more than one unrelated plant — usually the yellow oleander (Cascabela thevetia, "camalonga blanca") or a Strychnos species ("camalonga negra"). Early ethnography (Luna, 1986) recorded it without a confirmed botanical identity at all.
Is camalonga dangerous?
Yes — genuinely. Yellow-oleander seeds contain cardiac glycosides that can cause fatal heart arrhythmia (as few as 8–10 seeds can kill an adult), and Strychnos seeds contain strychnine, which causes lethal convulsions (Eddleston et al., 1999; Menza & Lee, 2024). There is no safe self-administered dose; it should only ever be used under an experienced maestro.
References
- Beyer, S.V. (2009) Singing to the Plants: A Guide to Mestizo Shamanism in the Upper Amazon. Albuquerque: University of New Mexico Press. UNM Press
- Eddleston, M., Ariaratnam, C.A., Meyer, W.P., Perera, G., Kularatne, A.M., Attapattu, S., Sheriff, M.H.R. & Warrell, D.A. (1999) 'Epidemic of self-poisoning with seeds of the yellow oleander tree (Thevetia peruviana) in northern Sri Lanka.' Tropical Medicine & International Health 4(4): 266–273. doi:10.1046/j.1365-3156.1999.00397.x
- Jauregui, X., Clavo, Z.M., Jovel, E.M. & Pardo-de-Santayana, M. (2011) '"Plantas con madre": plants that teach and guide in the shamanic initiation process in the East-Central Peruvian Amazon.' Journal of Ethnopharmacology 134(3): 739–752. doi:10.1016/j.jep.2011.01.042
- Luna, L.E. (1986) Vegetalismo: Shamanism Among the Mestizo Population of the Peruvian Amazon. Stockholm: Almqvist & Wiksell International. WorldCat
- Menza, D. & Lee, V.R. (2024) 'Strychnine toxicity.' In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. Bookshelf ID: NBK459306. StatPearls
- Pelletier, P.J. & Caventou, J.B. (1818) 'Note sur un nouvel alcali.' Annales de Chimie et de Physique 8: 323–324.
- Setubal, R.B., Frasier, C.L., Molina, J., Torke, B.M., Forzza, R.C. & Struwe, L. (2021) 'A toxic story: phylogeny and classification of Strychnos L. (Loganiaceae).' Systematic Botany 46(3): 639–655. doi:10.1600/036364421X16312067913444
- Tian, D.-M., Cheng, H.-Y., Jiang, M.-M., Shen, W.-Z., Tang, J.-S. & Yao, X.-S. (2016) 'Cardiac glycosides from the seeds of Thevetia peruviana.' Journal of Natural Products 79(1): 38–50. doi:10.1021/acs.jnatprod.5b00611
- POWO (2024) 'Cascabela thevetia (L.) Lippold.' Plants of the World Online, Royal Botanic Gardens, Kew. Available at: https://powo.science.kew.org/ (accessed 2026). POWO