Ibogaine has documented cardiac safety concerns. These include QT prolongation, potentially dangerous rhythm disturbances, and reports of serious adverse events. The U.S. Food and Drug Administration’s warning against ibogaine use specifically notes risks including cardiac arrhythmias and death. This is one reason generalized discussion of “plant medicine” can be misleading.
Ayahuasca raises a different set of medical concerns. The beta-carbolines are MAO inhibitors, so interaction questions involving serotonergic medicines and other substances are important. A general reference on monoamine oxidase inhibition helps explain why food, medication, and substance interactions are part of any careful conversation. Neither substance should be treated as inherently safe because it is described as natural or traditional.
For a more focused view of risk categories, the safety considerations comparison organizes questions around medical history, medication interactions, setting, and emergency planning without offering individualized medical advice.