Ibogaine has been associated with changes in cardiac electrical activity, including QT prolongation. QT prolongation can increase the risk of torsades de pointes, a potentially life-threatening ventricular rhythm; the National Center for Biotechnology Information’s clinical overview of torsades de pointes describes why a prolonged QT interval can matter.
Published case reports and reviews have described serious cardiac events and deaths in temporal association with ibogaine exposure. Those reports do not make every individual outcome predictable, but they do make broad claims of safety difficult to support. The documented ibogaine safety record also includes discussion of cardiac arrhythmia concerns and reported fatalities.
QT interval
An ECG can measure electrical timing in the heart. A normal-looking person can still have risks that require professional interpretation.
Compounding factors
Underlying heart disease, electrolyte changes, other substances, and concurrent medicines may change the picture.