Pre-Columbian Origins
Archaeological evidence for the use of Anadenanthera peregrina-based snuff in South America dates back approximately 4,000 years, making it one of the most ancient documented psychoactive practices in the Americas. Carved stone snuffing tablets, bone inhalation tubes, and ceramic paraphernalia have been excavated from archaeological sites in northern Chile, Argentina, and Peru, with some artifacts containing residues identified as bufotenine and related tryptamines. A remarkable cache of snuffing equipment found at a site in San Pedro de Atacama, Chile, dating to roughly 2000 BCE, contains implements that remain among the earliest physical evidence of organized psychedelic ritual in human history.
The tree's range spans the Orinoco basin, the Caribbean, and the savannas of central South America (the Cerrado and Llanos biomes), and evidence of its use is found across this broad region. The practice appears to have been widespread and ancient, embedded in shamanic cultures across diverse linguistic and cultural groups.
Cohoba in the Caribbean
The Spanish colonizers of the Caribbean were among the first Europeans to document the ceremonial use of Anadenanthera peregrina snuff, which they encountered among the Taíno people of Hispaniola (present-day Haiti and Dominican Republic) and Puerto Rico. The Taíno called the snuff cohoba and used it in elaborate ceremonial contexts — the cacique (chief) or behique (shaman) would inhale the powder through a bifurcated tube (called a tobaco in some descriptions, an etymology distinct from tobacco) while seated on a wooden stool (duho) carved with zoomorphic figures. The cohoba ceremony was used for divination, healing, communication with ancestral spirits (cemís), and important community decisions.
The Spanish friar Ramón Pané documented these ceremonies in his 1498 account Relación acerca de las antigüedades de los indios — one of the first ethnographic accounts written in the Americas. Pané described the preparation, administration, and apparent effects in remarkable detail, including visions and communication with spirits. The cohoba tradition was violently disrupted by Spanish colonization; the Taíno people were effectively wiped out within decades of contact, taking much of this tradition with them.
Yopo Among Orinoco and Amazonian Peoples
The living tradition of yopo use is most robustly documented among peoples of the Orinoco basin — the Guahibo (Sikuani), Piaroa, Yanomami, and related groups. Among the Yanomami of southern Venezuela and northern Brazil, a closely related preparation called épena or yakoa is made from the bark of Virola trees (which also contain tryptamines) rather than Anadenanthera peregrina seeds, but the ceremonial and pharmacological parallels are extensive.
The yopo ceremony among Guahibo and Piaroa shamans involves the insufflation of powdered seeds mixed with lime or ash — often administered by a companion who blows the powder into the nostril through a long tube. The experience is understood as a journey to the spirit world, with the shaman gaining access to healing knowledge, divination, and protective power.
Alexander von Humboldt documented yopo use among Orinoco peoples during his 1799–1804 expedition, providing the first detailed scientific description. Richard Spruce, the Victorian botanist who traveled extensively through the Amazon and Orinoco basins in the 1850s, collected botanical specimens of Anadenanthera peregrina and published detailed accounts of its preparation and use, providing the foundational modern botanical and ethnographic record.
Scientific Identification
The chemical identity of yopo's active principles was established gradually through the 20th century. Bufotenine was first isolated in 1934 by Handovsky — though initially from the skin secretions of Bufo toads (hence the name), and later identified in Anadenanthera peregrina seeds. The full alkaloid profile was characterized by multiple researchers through the 1950s–1970s.
The psychological controversy surrounding bufotenine — stemming from a 1956 experiment by Turner and Merlis in which psychiatric patients were administered intravenous bufotenine with limited psychoactive results but significant cardiovascular effects — delayed academic recognition of its psychedelic properties. Subsequent research, including the detailed studies by Jonathan Ott and clinical investigations, established that bufotenine does produce psychedelic effects at appropriate doses via appropriate routes.
Contemporary Use
Today, yopo use continues in traditional communities across South America while simultaneously attracting growing interest in Western psychedelic communities, particularly those interested in plant medicines and alternatives to the psilocybin and ayahuasca traditions. The seeds are sold legally in many countries as ethnobotanical specimens, though the active alkaloids (particularly bufotenine) are controlled substances in many jurisdictions.
