The heart is central to the safety question.
Ibogaine has been associated with QT prolongation, a change on an electrocardiogram that can increase concern about potentially dangerous arrhythmias in susceptible circumstances. The long QT syndrome overview helps explain why a prolonged QT interval receives clinical attention: electrical timing in the heart can matter when assessing risk of abnormal rhythm.
Published descriptions of investigational or off-label settings commonly emphasize medical history, medication reconciliation, electrolyte assessment, ECG monitoring, observation, and emergency preparedness. Magnesium protocols are often discussed in this context because magnesium is relevant to managing certain rhythm concerns and electrolyte abnormalities, but the presence of a protocol does not make ibogaine risk-free or suitable for a particular person.
For veterans with known heart disease, fainting history, arrhythmia concerns, or incomplete medical records, the need for careful discussion can be especially important. A licensed clinician is the appropriate person to interpret an ECG, personal history, and current medicines.