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Ibogaine

A psychoactive alkaloid researched chiefly for its potential to interrupt opioid and stimulant dependence.

State of the evidence

Synthesized

Synthesized from 25 studies in the library · AI-generated, grounded in the abstracts below

Found by searching the library for Ibogaine, iboga, noribogaine, then ranked by relevance.

Ibogaine shows preliminary evidence for reducing opioid withdrawal symptoms and drug craving, with several observational studies and case series reporting rapid detoxification and sustained abstinence in some individuals. However, the evidence is limited by small sample sizes, lack of randomized controlled trials, and significant safety concerns including neurotoxicity in animal models and risk of cardiac arrhythmia and death, particularly during opioid detoxification. The overall evidence is insufficient to support clinical use without rigorous safety monitoring.

Confidence in the evidence

Low
  • Only three RCTs identified, with small sample sizes and mixed results; most evidence from observational studies and case series.
  • Animal studies consistently show neurotoxic effects (Purkinje cell degeneration) and tremor, raising safety concerns.
  • Large retrospective study (19,071 patients) found mortality concentrated in opioid detoxification, but absolute rate is low and non-adjudicated.
  • Inconsistent findings on durability of effect: some studies show sustained abstinence, others show relapse within days to weeks.
How we rate confidence

Confidence reflects the strength of the underlying evidence, not whether the result is favorable. It weighs the number and size of studies, their design (randomized trials count for more than observational or single-case work), how consistently they point the same way, and their risk of bias.

Tiers run from Insufficient to High. High is rare in this field: small, early, or open-label studies land lower even when their direction is encouraging.

Evidence by study

Direction is each study's finding relative to your question: Supports, Opposes, No effect, Mixed, or Unclear.

Serotonin transporter-ibogaine complexes illuminate mechanisms of inhibition and transport. 2019
Unclear

Ibogaine noncompetitively inhibits serotonin transport by stabilizing the cytoplasm-facing state of SERT, providing a structural mechanism for its psychoactive and anti-addictive properties.

preclinical

Degeneration of Purkinje cells in parasagittal zones of the cerebellar vermis after treatment with ibogaine or harmaline. 1993
Opposes

Ibogaine and harmaline cause degeneration of Purkinje cells in parasagittal stripes of the cerebellar vermis in rats, indicating selective neurotoxicity.

preclinical

Treatment of acute opioid withdrawal with ibogaine. 1999
Supports

Resolution of opioid withdrawal signs within 24 hours in 25 of 33 patients, sustained over 72 hours, with one fatality possibly due to surreptitious heroin use.

observational · Sample size: 33

Effects and aftereffects of ibogaine on morphine self-administration in rats. 1991
Supports

Ibogaine dose-dependently decreased morphine self-administration acutely and produced persistent decreases for days to weeks in some rats, with no aftereffect on water-reinforced responding.

preclinical

Effects of iboga alkaloids on morphine and cocaine self-administration in rats: relationship to tremorigenic effects and to effects on dopamine release in nucleus accumbens and striatum. 1994
Supports

Ibogaine and several iboga alkaloids dose-dependently decreased morphine and cocaine self-administration acutely, with some producing aftereffects the next day; tremorigenic activity was noted.

preclinical

The ibogaine medical subculture. 2008
Supports

68% of individuals took ibogaine for substance-related disorders, 53% specifically for opioid withdrawal, indicating widespread use for detoxification despite lack of clinical standards.

observational · Sample size: 3414

Glial Cell Line-Derived Neurotrophic Factor Mediates the Desirable Actions of the Anti-Addiction Drug Ibogaine against Alcohol Consumption 2005
Supports

Ibogaine decreased ethanol self-administration in rats and increased GDNF expression in the VTA; intra-VTA GDNF mimicked and anti-GDNF antibodies reduced the effect, identifying a molecular mechanism.

preclinical

Inhibitory effects of ibogaine on cocaine self-administration in rats. 1993
Supports

A single injection of ibogaine (40 mg/kg) significantly decreased cocaine intake for over 48 hours, with repeated weekly injections producing more prominent inhibition.

preclinical

A preliminary investigation of ibogaine: case reports and recommendations for further study. 1994
Supports

Single doses of 700-1800 mg ibogaine eliminated opiate withdrawal symptoms; three of seven remained drug-free for 14 weeks or more, while others relapsed after days to weeks.

observational · Sample size: 7

The Olivocerebellar Projection Mediates Ibogaine-Induced Degeneration of Purkinje Cells: A Model of Indirect, Trans-Synaptic Excitotoxicity 1997
Opposes

Ibogaine-induced Purkinje cell degeneration is indirect and dependent on integrity of the olivocerebellar projection, consistent with excitotoxic mechanism via climbing fiber activation.

preclinical

Treatment of opioid use disorder with ibogaine: detoxification and drug use outcomes. 2018
Supports

Ibogaine significantly reduced opioid withdrawal scores acutely; at 1-month follow-up, 50% reported no opioid use in prior 30 days, with sustained improvement in drug use scores over 12 months.

observational · Sample size: 30

Ibogaine treatment outcomes for opioid dependence from a twelve-month follow-up observational study. 2018
Supports

Significant reductions in addiction severity and depression scores from baseline to 12-month follow-up after a single ibogaine treatment; acute withdrawal symptoms also reduced.

observational · Sample size: 14

Ibogaine, a noncompetitive inhibitor of serotonin transport, acts by stabilizing the cytoplasm-facing state of the transporter. 2007
Unclear

Ibogaine noncompetitively inhibits serotonin transport by stabilizing the cytoplasm-facing state of SERT, contrasting with cocaine's mechanism.

preclinical

Ibogaine: complex pharmacokinetics, concerns for safety, and preliminary efficacy measures. 2000
Supports

Ibogaine significantly decreased craving for cocaine and heroin during inpatient detoxification and reduced depressive symptoms at 30 days post-discharge; complex pharmacokinetics noted.

observational

Ibogaine possesses a selective affinity for sigma 2 receptors. 1995
Unclear

Ibogaine has relatively high affinity for sigma-2 receptors (Ki=90.4 nM) and much lower affinity for sigma-1 receptors (Ki=9310 nM), suggesting a novel mechanism.

preclinical

Toward a nuanced framework for the medical development of ibogaine and its analogues and derivatives: implications for psychopharmacology 2026
Unclear

Ibogaine shows therapeutic potential across substance use disorders, trauma, mood disorders, and suicidality, but clinical translation is hindered by safety concerns, regulatory barriers, and complex pharmacology.

review

MiSAM opposes bill giving $50 million in opioid settlement funds to ibogaine research 2026
Opposes

The Michigan Society of Addiction Medicine opposed a bill allocating $50 million in opioid settlement funds to ibogaine research, indicating professional skepticism.

other

Development and validation of a UPLC-MS/MS method for real-time neuropharmacokinetic monitoring of iboga alkaloids in rat brain. 2026
Unclear

A validated UPLC-MS/MS method was developed to quantify ibogaine, noribogaine, ibogamine, and oxa-noribogaine in rat brain microdialysate, enabling real-time neuropharmacokinetic monitoring.

preclinical

Indication-stratified mortality risk of ibogaine treatment under contemporary safety protocols: a multisite analysis of 19,071 patients and updated systematic review of fatalities 2026
Opposes

Six deaths occurred within 72 hours among 10,382 opioid use disorder patients, with none among 8,689 non-SUD patients; mortality risk is concentrated in opioid detoxification.

observational · Sample size: 19071

Physarum-Mediated Biofeedback Rehabilitation: A Bio-Hybrid Framework for Ibogaine-Assisted Neural Recovery 2026
Unclear

A bio-hybrid framework using Physarum-mediated biofeedback for ibogaine-assisted neural recovery is proposed as a defensive publication, with no empirical data.

theoretical

Uso da ibogaína no tratamento da dependência química: uma revisão de literatura 2026
Mixed

Ibogaine shows multimodal action and potential for reducing withdrawal and craving, but safety remains the main limitation due to QTc prolongation, arrhythmias, and cardiac events.

review

Clinical improvement following an integrative iboga microdosing protocol in post-concussive and hypoxic brain injury syndromes: a case series 2026
Supports

An integrative iboga microdosing protocol (estimated 3.8-38.5 mg/day ibogaine) paired with psychotherapy was associated with clinical improvement in three cases of brain injury.

observational · Sample size: 3

Exploring the Use of Ibogaine in Opioid Recovery: Insights from Lived Experience 2026
Supports

Participants associated ibogaine treatment with rapid detoxification, improved mood, reduced anxiety, and periods of sustained abstinence, though relapse occurred in some cases.

qualitative · Sample size: 10

Ibogaine induces juvenile-like plasticity and modulates functional and structural regulators of plasticity in the adult mouse visual cortex. 2026
Supports

A single dose of ibogaine (40 mg/kg) reinstated juvenile-like experience-dependent plasticity in the adult mouse visual cortex, reducing perineuronal nets and inhibitory synaptic markers.

preclinical

From monotherapy to sequential models: An updated scoping review on ibogaine’s role in treatment for psychiatric disorders 2026
Mixed

Only three RCTs were identified: one showed reduced cocaine craving, one found noribogaine safe in healthy volunteers, and one showed QTc prolongation with non-significant withdrawal reduction in opioid-dependent patients.

review

Points of agreement

  • Multiple observational studies and case series report that ibogaine reduces opioid withdrawal symptoms acutely.
  • Preclinical studies consistently show that ibogaine decreases self-administration of morphine, cocaine, and ethanol in rats.
  • Ibogaine has complex pharmacology, including inhibition of serotonin transport, sigma-2 receptor affinity, and GDNF upregulation.
  • Safety concerns are consistently noted: neurotoxicity in animal models (Purkinje cell degeneration) and cardiac risk (QTc prolongation, arrhythmias) in humans.

Conflicts

  • Durability of effect varies widely: some studies report sustained abstinence for months, while others show relapse within days to weeks.
  • The large retrospective study (27250) found mortality only in opioid detoxification, but other studies report no deaths or attribute fatalities to surreptitious drug use.
  • Professional organizations (e.g., MiSAM) oppose funding ibogaine research, while other researchers advocate for its development with safety protocols.

Gaps

  • No large, double-blind, placebo-controlled RCTs of ibogaine for opioid use disorder exist.
  • Long-term safety data, especially regarding cardiac and neurological effects, are lacking.
  • Optimal dosing, route of administration, and patient selection criteria are not established.
  • The role of active metabolites (e.g., noribogaine) and their contribution to efficacy and toxicity is unclear.
  • Most studies are small, open-label, or observational, with high risk of bias and lack of standardized outcome measures.
Browse these studies in the library
How we analyze this

This synthesis reads the 15 most-cited and 10 most recent studies whose primary subject is Ibogaine, up to 25 in all. The most-cited set anchors the established evidence, and the recent set surfaces work that is too new to have gathered citations yet.

A study qualifies only when Ibogaine or a known alias appears in its title or keywords, so broad reviews that mention it only in passing are left out. Each study is read from its abstract, strongest evidence first, and the summary reports the direction of the results along with any conflicts and gaps.

Ask your own question in the Research Synthesis Tool

656 articles · 120 from the last two years · 43,432 participants across 105 studies reporting sample size

Common study designs

review 102 case study 17 systematic review 22 experimental study 111 theoretical or philosophical paper 17

Research

Synthesize the evidence → Search all →

JNDS, Volume 16, Number 1

University of North Texas Digital Library (University of North Texas) • Bianchi, Antonio

Ketamine can produce experiences resembling near-death experiences (NDEs), but the nature of these experiences differs depending on the context—recreational use versus use in an operating room. Both ketamine and ibogaine, a substance used in Central African religious rituals to induce NDEs, are noncompetitive antagonists of the NMDA receptor. Ibogaine also elicits different experiences based on whether it is used in a hallucinatory context or in initiatic rituals that induce a superficial coma. These observations raise the question of whether the chemically-induced NDE-like experience stems from the specific substance or from the genuine comatose state itself.

DOI: 10.17514/jnds-1997-16-1-p71-78 Nmda receptor Ketamine Psychology Neuroscience +1

Maria Sabina-Die enteignete Heilerin / Vier Enteignungen, ein Muster

Zenodo (CERN European Organization for Nuclear Research) • July 8, 2026 • Schüller Thomas

Two works examine the appropriation of Indigenous healing practices. The first, 'Die enteignete Heilerin' (The Expropriated Healer), focuses on the Mazatec shaman Maria Sabina, whose use of psilocybin mushrooms was co-opted by outsiders. The second, 'Vier Enteignungen, ein Muster' (Four Expropriations, One Pattern), compares the appropriation of peyote, ayahuasca, salvia, and iboga, arguing that a common pattern of colonial and capitalist expropriation underlies these cases.

DOI: 10.5281/zenodo.21252639 Theme computing Subject documents Context archaeology Art

Toward a nuanced framework for the medical development of ibogaine and its analogues and derivatives: implications for psychopharmacology

Expert Opinion on Drug Discovery • July 4, 2026 • Christopher D. Verrico, Lynnette A. Averill, Cameron J Moore et al.

Ibogaine, a natural alkaloid, shows potential for treating substance use disorders, trauma, mood disorders, and suicidality, but clinical use is limited by safety concerns and regulatory barriers. Researchers are pursuing two main strategies: developing ibogaine-like compounds that keep broad effects while reducing risks, and creating selective 'bespoke' analogs targeting specific conditions like opioid use disorder, traumatic brain injury, or PTSD. The authors emphasize that the field should avoid oversimplified views that derivatives are uniformly better or interchangeable, and call for greater conceptual clarity and mechanistic humility as ibogaine-based therapies move toward regulated medical use.

DOI: 10.1080/17460441.2026.2693144 Clarity Drug development Psychopharmacology Addiction +7

The purpose of the psychosocial protocol in the psychedelic-assisted therapy: A scoping review

Journal of Psychopharmacology • June 26, 2026 • Flavia Giaffone de Paiva Ferreira, João Ariel Bonar Fernandes, Renato Filev et al.

A scoping review categorized psychosocial protocols used in psychedelic research for mental health treatment. Seven categories were defined, reflecting distinct emphases on the substance, participant, research team, and sociocultural context. Although limited reporting and heterogeneity remain methodological challenges, the proposed parameters suggest a shared language to describe, compare, and examine psychosocial protocols across studies, reducing conceptual uncertainty. The review may facilitate research decision-making and support structured, replicable study designs while allowing flexibility for individualized and culturally responsive care. Explicitly defining the intended purpose of psychosocial protocols could improve transparent reporting and evaluation.

DOI: 10.1177/02698811261453850 Psychosocial Categorization Observational study Flexibility engineering +15

Development and validation of a UPLC-MS/MS method for real-time neuropharmacokinetic monitoring of iboga alkaloids in rat brain.

Journal of pharmaceutical and biomedical analysis • June 24, 2026 • Scot Mcintosh, Isabella Maldonado, Nickalus C Smith et al.

A sensitive UPLC-MS/MS method was developed and validated to quantify ibogaine, noribogaine, ibogamine, and oxa-noribogaine in rat brain microdialysate, measuring pharmacologically active, unbound drug in brain extracellular fluid rather than total tissue content. The method achieved lower limits of quantification of 0.78-1.56 ng/mL with a 6-minute run time, and calibration curves were linear over 0.78-75 ng/mL for ibogamine and 1.56-75 ng/mL for the other analytes. Accuracy and precision met acceptance criteria. Applied to rats (n=4), noribogaine in nucleus accumbens after 10 mg/kg intraperitoneal administration reached a peak unbound concentration of 292 ± 68 ng/mL at 50 minutes, demonstrating suitability for real-time neuropharmacokinetic profiling of iboga alkaloids.

DOI: 10.1016/j.jpba.2026.117630 Full text Bioanalytical method validation Brain microdialysis Iboga alkaloids Neuropharmacokinetics +1

Indication-stratified mortality risk of ibogaine treatment under contemporary safety protocols: a multisite analysis of 19,071 patients and updated systematic review of fatalities

Research Square • June 17, 2026 • Martijn Arns, Kenneth Shinozuka, Joseph Barsuglia

Ibogaine, a substance showing early promise for treating substance use disorders and PTSD in veterans, carries a risk of cardiac arrhythmia and death. A retrospective multisite study of 19,071 patients treated under safety guidelines at 11 international clinics found that all six deaths occurring within 72 hours were among patients treated for opioid use disorder (6 out of 10,382), with no deaths among 8,689 non-SUD patients. A systematic review of ibogaine-associated fatalities mirrored this pattern: 41 of 44 fatalities with known indication involved substance use disorder, predominantly opioid detoxification. The findings indicate that ibogaine-associated mortality is largely confined to opioid detoxification and rare in non-SUD indications.

DOI: 10.21203/rs.3.rs-9966269/v1 Full text Opioid use disorder Detoxification alternative medicine Poison control Mortality rate +7

Physarum-Mediated Biofeedback Rehabilitation: A Bio-Hybrid Framework for Ibogaine-Assisted Neural Recovery

Zenodo (CERN European Organization for Nuclear Research) • June 12, 2026 • Saeid Ghiasi

A system is described that maps human brain activity (EEG frequency, amplitude, and phase) to the behavior of a living slime mold (Physarum polycephalum) to create a biohybrid interface for addiction recovery. The slime mold's network growth and retraction are controlled by nutrient gradients that correspond to neural signals: higher activation in addiction-related brain regions reduces food at corresponding Physarum nodes, causing network retraction. The system is presented as a structural isomorphism—not a metaphor—between neural plasticity, Physarum tube reinforcement, and ibogaine's neurorestorative mechanisms (NMDA receptor blockade, BDNF/GDNF upregulation). The document is a defensive publication establishing prior art under patent treaties, released under CC-BY 4.0.

DOI: 10.5281/zenodo.20655646 License Notice Cognition Anticipation artificial intelligence +8

Neural Attunement as a Post-Acute Framework for Stabilizing Neuroplasticity

Zenodo (CERN European Organization for Nuclear Research) • June 5, 2026 • Mark Nicolas

Most psychedelic research focuses on brain changes during the acute drug experience, but important changes also occur afterward. Ibogaine, studied only in the post-acute period, produces lasting reductions in neural signal complexity, shifts toward slower brain waves, decreased beta and gamma power, slowed peak alpha frequency, and improved cognitive inhibition lasting weeks. Similar post-acute changes from classical psychedelics suggest a shared stabilization phase. The Neural Attunement Model formalizes this post-acute phase as an organized, low-noise window for stabilizing neuroplasticity, specifying three convergent features and testable predictions. Ibogaine's long half-life and diverse pharmacological actions may extend this window, making it an empirical anchor for a regime that may generalize to other interventions.

DOI: 10.5281/zenodo.20549391 Neuroplasticity Electrophysiology Cognition Electroencephalography +6

Clinical improvement following an integrative iboga microdosing protocol in post-concussive and hypoxic brain injury syndromes: a case series

Frontiers in Pharmacology • June 3, 2026 • Burton J. Tabaac, Robin L. Carhart-Harris, Teresa Yung

Three individuals with persistent symptoms after traumatic brain injury or hypoxic-ischemic brain injury completed a six-week protocol combining a participant-directed iboga-containing microdosing regimen (using whole root bark biomass with about 3.845% ibogaine content, yielding an estimated 3.8–38.5 mg/day ibogaine equivalent) with weekly Accelerated Experiential Dynamic Psychotherapy and supportive nutraceuticals. All three showed progressive neurological recovery; two reported complete symptom remission at long-term follow-up. Participants discontinued all prescription medications and reported resolution of headaches, brain fog, fatigue, irritability, and mood swings, with a return to regular activities and renewed enthusiasm. The authors note that the findings do not establish causality or iboga-specific efficacy due to the multimodal intervention and methodological limitations.

DOI: 10.3389/fphar.2026.1840956 Traumatic brain injury Mood Therapeutic effect Depression economics +7

Clinical trials

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