Iboga vs Ibogaine

Heart risk first. Ibogaine can delay the heart's electrical recovery (called QT prolongation) and has been linked to dangerous rhythms, cardiac arrest and deaths. [1] If someone has taken iboga or ibogaine and has fainting, chest pain, a racing or irregular heartbeat, seizures or trouble breathing, call 911 (US) or your local emergency number. US Poison Help is 1-800-222-1222. See poisoning: what to do first. This page is information only. It gives no amounts, preparation steps or advice to use either one.

Evidence labels used here: approved medicine (a regulator has approved it for a stated use), insufficient evidence, preclinical (cells or animals only), evidence of harm. Where we looked and found nothing usable, we write "Proper evidence not found."

Definitions

• Iboga is a plant: the shrub Tabernanthe iboga, an accepted species name in the GBIF taxonomy (family Apocynaceae). [2] It grows in the lowland forests of the Congo Basin. Its root bark contains a number of alkaloids, and ibogaine is the one that has drawn the most interest. [3]
• Ibogaine is one isolated chemical, an indole alkaloid. [1] It is not the same thing as the plant, the root bark or the traditions around them.
• Bwiti is a religion practiced in Gabon and, to a lesser extent, other Central African countries, in which iboga is central. Chacruna Institute describes the plant as a cultural keystone species, meaning one of exceptional significance to a people. [4] A chemical is not a ceremony. See Iboga and Bwiti traditions.

Side-by-side

Because ibogaine is only one of several alkaloids, a root-bark product and a purified compound should not be assumed to act alike. Reviewers also flag the uninformed use of traditional plant forms as a risk factor in deaths. [6]

What research shows

All research below concerns ibogaine or its main breakdown product noribogaine, not the plant in its cultural use.

• Opioid use disorder: insufficient evidence. A 2026 narrative review of 24 studies and 38 case reports found most positive data came from uncontrolled, open-label or retrospective studies, many in nonclinical settings, with a high risk of bias. No double-blind randomized trial has shown ibogaine or noribogaine effectively treats opioid use disorder. [7]
• Cocaine use disorder: insufficient evidence. The same review found only one small randomized trial with significant effects. [7]
• Brain effects in animals: preclinical. Rat studies showed nerve-cell damage in the cerebellum, probably at higher doses, and its relevance to people is unclear. [1]

Risks

• Heart. Blocking the heart's hERG potassium channels delays repolarization, which can lead to QT prolongation, arrhythmia and sudden cardiac arrest. A toxicology review counted 27 reported deaths after ibogaine ingestion. [1]
• Deaths in context. A forensic review of 19 deaths found that serious existing illness, mostly cardiovascular, or other substances explained or contributed to 12 of the 14 cases with adequate post-mortem data. [6]
• Medicines. Ibogaine is broken down mainly by the CYP2D6 enzyme, so differences in that enzyme can matter for people taking other medicines. [1] Never stop or change a medicine without the prescriber.
• Overall judgment. The 2026 review concluded that evidence is insufficient to support clinical use, given the cardiac risk. [7]

Conservation

Chacruna Institute reports concern over overharvesting and export of wild iboga, which affects the Bwiti communities who use it. [4] See Indigenous traditions, ethics and conservation.

Legal note

Laws change and this is not legal advice. In the United States, ibogaine is named in the federal Schedule I list in 21 CFR 1308.11 (read 2026-10-22). [5] Other countries and US states: not verified. See legal status by country.

No universal winner

These are not two options to choose between. One is a living plant with cultural meaning, the other is a compound with documented cardiac danger. For the full pages, see Iboga (Tabernanthe iboga) and Ibogaine: compound guide.