The physiological concern
Cardiac risk is central, not incidental
Ibogaine has been associated with changes in cardiac electrical activity, including QT prolongation. The QT interval is part of the heart’s electrical cycle; the medical context for long QT syndrome helps explain why clinicians take lengthened repolarization seriously.
Arrhythmia risk is not a single-variable question. It can be shaped by personal or family cardiac history, current and recent medicines, electrolyte problems, liver function, co-occurring illness, and the condition of the person at the time of exposure. A serious review therefore cannot rely on a general assurance that someone is “healthy.”
“Screening” only has value when the information is competently interpreted and matched to a setting prepared for what it may reveal.
Published safety discussions also identify interaction concerns. Opioids, SSRIs, and other medicines may matter through direct effects, withdrawal-related stress, metabolism, or combined cardiac risk. The FDA’s safety communication on abnormal heart rhythms is a useful reminder that medicine-related QT risk is assessed in context, not in isolation.