French physician P. Reinburg's account of his ayahuasca ingestion among the Záparo in May 1913, published in the Journal de la Société des Américanistes. Rather than visions, he experienced a severe toxic reaction with pulse loss, vomiting, and spasms, recorded in clinical detail.
Anthropologist Rafael Karsten's account of a Jívaro victory feast describes the natéma ceremony, in which the vision-inducing drink made from Banisteria caapi and tobacco is prepared ritually and drunk communally. The passage covers preparation, the emetic effect, and beliefs that the visions foretell prosperity.
A 1923 doctoral thesis reporting Fischer Cárdenas's isolation of the yagé alkaloid that Rafael Zerda Bayón had named telepathine (telepatina) decades earlier without isolating it. Seven case reports detail effects on human subjects, including the author's self-experiment, describing vivid dreams, visual hallucinations, and euphoria at low doses, followed by a systematic summary of physiological action.
Rouhier's two-part dossier for Bulletin des Sciences Pharmacologiques: a translation of Barriga Villalba's 1923 paper on alkaloid yagéine, followed by Rouhier's ethnographic and pharmacological notes. Rouhier catalogues dose-dependent effects and includes chemical analysis of a Jívaro preparation.
Berlin pharmacologist Louis Lewin announces his isolation of banisterine from Banisteria caapi and its identity to harmine. He describes animal experiments and preliminary human trials showing that banisterine relieved the muscular rigidity of encephalitis lethargica (post-influenza sleeping sickness).