Ibogaine Side Effects: What Is Documented

Most published lists of ibogaine side effects mix two different kinds of thing. On one side are effects that are unpleasant, expected, and part of what the drug does: vomiting, difficulty walking, days without proper sleep. On the other is a change to the heart’s electrical timing that produces no sensation at all and is the change implicated in the deaths.

Reading them as one list is the mistake this page is written to prevent.

How the literature is organised

The systematic review of adverse events published in 2022 followed PRISMA methodology and included eighteen studies covering the period 2015 to 2020. It sorts what it found by timing rather than by organ, and that turns out to be the useful division.

Effects within the first 24 hours were mainly cardiac, gastrointestinal, neurological and general clinical changes. The most common cardiac finding was QTc prolongation. Effects lasting beyond 24 hours were mainly persistent cardiac alterations, together with psychiatric and neurological signs.

The same review reports something that should temper every frequency claim made about this drug, including the ones on clinic websites. Its results were highly heterogeneous in terms of the kind of product used and the dosages known. It also opens by noting that most studies in this area are case reports or were conducted in non-controlled settings, so causation cannot be clearly established.

The expected effects

These are reported consistently enough to be described as characteristic, and none of them is the reason for medical monitoring.

Ataxia was reported in every participant of the 30-person supervised series, the only cohort observed closely enough to give a rate at all, small and self-selected as it was. Coordination and balance are impaired for many hours, which is why people are not left to walk unaccompanied. Nausea and vomiting are among the most commonly reported effects, and matter beyond discomfort because low potassium lengthens the QT interval further, and potassium was low wherever it was measured in the ibogaine fatality and arrhythmia cases.

Tremor, and sensitivity to light and sound, are reported consistently across the reviewed series, which is why sessions are run in darkened, quiet rooms. Insomnia can persist for several days after the acute phase, sometimes longer, and is one of the more consistently under-described features in promotional accounts.

Bradycardia, a slowed heart rate, sits awkwardly between the two categories. It is expected, but it is also one of the named risk factors for the arrhythmia, so it is monitored rather than merely noted.

The effects that are not really side effects

Ibogaine inhibits the hERG potassium channel at low micromolar concentrations, which slows the electrical reset of heart muscle and stretches the QT interval. Torsade de pointes is the arrhythmia that can follow, and it is sometimes fatal. The mechanism and the screening built around it are set out on ibogaine and the heart.

What people actually present with, when it goes wrong outside a clinic, is documented in a ten-year series from the United Kingdom National Poisons Information Service. Among seven patients, six showed features of cardiotoxicity, and the most frequently reported features were:

• cardiac arrest and hypoxia
• torsade de pointes and QT interval prolongation
• coma, convulsions and stupor
• bradycardia, vomiting and anxiety

Every patient in that series had neurological symptoms.

Seizures deserve separate mention. The fatality review identified seizures associated with withdrawal from alcohol and benzodiazepines as a risk factor in its own right, which is a hazard of the situation people are usually in when they take ibogaine rather than of the drug alone.

Frequency is the thing nobody can give you

Sites that publish percentages for ibogaine side effects are constructing them. The published record does not support frequency estimates, for three reasons, one of which the reviews state plainly and two of which follow from what they describe.

The denominators are missing. Most ibogaine is taken outside any registry, so the number of people exposed is unknown, and a count of adverse events without an exposure count is not a rate.

The products are not comparable. Root bark, total alkaloid extract and purified hydrochloride appear across the same literature, in doses that are frequently not known even to the person reporting them.

The observation is short and selective. Case reports arrive because something went wrong. People who feel unwell three months later are not systematically counted anywhere, which is why the long-term picture in the reviews is thin rather than reassuring.

What this means before a decision

The useful question is not which side effects occur, because the list is reasonably well established. It is which of them can be seen without equipment, and the answer is: not the one that matters.

Vomiting, ataxia and tremor announce themselves. QT prolongation does not, and that asymmetry is the entire case for an ECG beforehand, corrected electrolytes, and monitoring that continues past the point where the person seems to be through it. The risks that come from taking this without any of that are set out on buying iboga online, and the section index is is iboga safe.