What Is the Ibogaine Flood Dose? Understanding Treatment Protocols

If you’ve been researching ibogaine treatment, you’ve probably come across the term “flood dose.” It comes up constantly — but it’s rarely explained clearly. What does it mean? How is it different from other doses? Is it safer or more dangerous? And is it the right approach for addiction treatment?

This guide explains everything you need to know about ibogaine flood dosing — what it is, how it works, what the experience is like, and how treatment centers calibrate the dose to each individual patient.

What Is a Flood Dose?

An ibogaine flood dose is a large, single administration of ibogaine — typically 10–25 mg/kg of body weight — intended to produce a full, extended psychedelic experience lasting 24–36 hours. The term “flood” refers to the fact that the dose floods the brain’s receptor systems simultaneously, producing the full therapeutic effect in a single session.

This is distinct from:

• Microdoses (1–3 mg/kg) — sub-psychedelic doses used for neurological conditions like Parkinson’s, depression maintenance, or cognitive enhancement. No visionary experience.
• Low/medium doses (3–8 mg/kg) — may produce mild visionary states, used sometimes in ceremonial or therapeutic contexts. Partial effect on withdrawal and cravings.
• Flood doses (10–25 mg/kg) — full psychedelic experience plus maximum effect on opioid receptors, dopamine reset, and GDNF release. The dose used for addiction treatment.

In the context of addiction medicine, the flood dose is considered the therapeutic standard — the dose at which ibogaine produces its most dramatic and lasting effects on withdrawal, cravings, and the psychological roots of dependence.

How Is the Flood Dose Calculated?

The flood dose is weight-based, typically expressed as mg of ibogaine per kilogram of body weight (mg/kg). A 75 kg (165 lb) person receiving a 15 mg/kg dose would receive approximately 1,125 mg of ibogaine.

But the actual dose protocol varies significantly by:

• The form of ibogaine used: Pure ibogaine hydrochloride (HCl) is the most potent and most precisely dosed. Total alkaloid extract (TA) contains other alkaloids alongside ibogaine and requires a different calculation. Ceremonial root bark is the least precise and not typically used in clinical settings for addiction treatment.
• The patient’s history: Opioid-tolerant patients may metabolize ibogaine differently. Patients with a history of stimulant use have different dopamine baseline levels.
• The clinical protocol: Some clinics split the dose — a test dose followed by the main dose — to monitor tolerance and cardiac response before proceeding. Others administer a single full dose in a medically supervised setting with immediate cardiac intervention capacity.
• Individual cardiac and metabolic factors: Slower metabolizers (often identifiable via CYP2D6 genetic testing) process ibogaine more slowly, which affects both the intensity and duration of the experience.

A reputable clinical program will not apply a one-size-fits-all flood dose. Your protocol will be calibrated based on your weight, medical history, current drug use, and cardiac screening results.

Why Is the Flood Dose Used for Addiction?

The relationship between dose and therapeutic effect in ibogaine is not linear — it’s threshold-based. Below a certain dose level, ibogaine produces partial effects. Above the flood dose threshold, the full mechanism of action is engaged.

The therapeutic effects that emerge specifically at flood dose include:

Complete Opioid Withdrawal Interruption

At flood dose levels, ibogaine resets opioid receptor function comprehensively — not partially. The reduction in withdrawal documented in research (In the largest published series (Brown & Alper, 2017, n=30, open-label) mean opioid withdrawal scores fell from 31 to 14 within about three days) was achieved with flood dosing. Lower doses produce incomplete withdrawal relief.

Maximum GDNF Release

GDNF (glial cell line-derived neurotrophic factor) — the protein that stimulates repair of dopamine neurons damaged by addiction — is released in proportion to dose. Flood-level dosing produces the maximum GDNF effect, and this is the primary driver of the long-term craving reduction that follows treatment.

Full Visionary Experience

The psychological processing that makes ibogaine uniquely effective at treating the underlying emotional roots of addiction only occurs at flood dose. The visionary state — the 8–12 hours of autobiographical, symbolic, and confrontational inner experience — is not present at lower doses. Without this experience, ibogaine is primarily pharmacological rather than integrative.

The Flood Dose Experience: What to Expect

Understanding what the flood dose actually feels like is essential preparation for anyone considering ibogaine treatment. The experience is unlike any other psychedelic — longer, more internally focused, and more demanding.

Onset (Minutes 0–60)

Within 30–60 minutes of ingestion, most people notice a low-frequency buzzing or vibration in the body. Nausea is common in this window and is managed by clinical staff. Movement becomes difficult — ataxia (loss of coordination) develops as the ibogaine takes effect. Sound and light sensitivity increases. This is the signal that the experience is beginning.

Acute Phase (Hours 1–8)

The full visionary experience emerges. Behind closed eyes, most people see highly realistic, cinematic narratives — often autobiographical, often drawn from deep memory. The experience is characterized by emotional clarity rather than confusion: things feel important, true, and visible in a way they normally aren’t.

For people being treated for addiction, this phase often involves direct encounter with the emotional origins of their drug use — the trauma, the need, the pattern. Many describe seeing themselves from a third-person perspective: watching their own life as if it were a film, with unusual emotional distance and insight.

Physically, the body is largely still during this period. Movement is not recommended. Clinical staff monitor continuously — particularly cardiac rhythms, which ibogaine temporarily affects.

Evaluation Phase (Hours 8–20)

The intense visionary content begins to subside. The mind becomes quieter and more reflective. Many people experience a profound stillness — often described as the first quiet they’ve felt in years. Integration begins organically: the mind starts making sense of what it encountered in the acute phase.

For opioid-dependent patients, this is also the point at which the absence of withdrawal becomes undeniable. The physical misery that accompanied arrival has resolved.

Residual Phase (Hours 20–36)

The experience gradually winds down. Most people are awake — ibogaine is a stimulant in its later phases and sleep is difficult. Sensitivity remains heightened. Thoughts tend to be clear, calm, and insightful. Many people want to write or talk about what they experienced.

This phase transitions into the post-treatment “afterglow” — a period of unusual clarity and openness that can persist for days to weeks.

If you or someone close to you needs help right now, SAMHSA’s national helpline is free, confidential and staffed 24/7 on 1-800-662-HELP.

What Screening and Monitoring a Flood Dose Requires

The flood dose is the part of the protocol that makes the medical infrastructure around it matter. Everything below is standard at a properly run clinic, and its absence is the clearest warning sign there is.

What that looks like in practice:

• A full work-up including an EKG before a flood dose is administered, with results reviewed by a clinician
• Continuous medical monitoring throughout the experience
• IV access, emergency medications and equipment on-site, and a written hospital-transfer plan
• A medication review beforehand, with tapering where it is needed — and honest exclusion of anyone the screening shows is not a safe candidate

A flood dose belongs in a supervised medical setting with that infrastructure in place. It does not belong in a non-clinical setting, and it is never something to attempt alone.

Ibogaine HCl vs. Total Alkaloid Extract — Which Is Used for Flood Dosing?

Both forms are used at reputable clinics, and each has distinct characteristics:

For addiction treatment — especially opioid detox — ibogaine HCl is generally preferred because the precise dosing allows clinicians to calibrate the flood dose with greater accuracy and manage cardiac monitoring parameters more reliably.

After the Flood: What Happens Next

The flood dose is the beginning, not the end, of treatment. What happens in the 4–12 weeks following is often what determines whether the reset holds.

The post-flood window is characterized by significantly reduced cravings (typically for 4–12 weeks), heightened emotional openness and sensitivity, increased neuroplasticity — the brain’s capacity to form new patterns, and, for opioid users, complete resolution of acute withdrawal.

The best ibogaine programs build structured aftercare around this window. Integration therapy, peer support, and lifestyle restructuring during the weeks following flood dosing dramatically improve long-term sobriety outcomes.

Is the Ibogaine Flood Dose Right for You?

The flood dose is appropriate for people seeking addiction treatment who are medically cleared and genuinely ready to engage with a demanding, transformative experience. It is not appropriate for recreational use, for people with contraindicated cardiac conditions, or for people unwilling to commit to the post-treatment work that makes it effective.

If you’re considering ibogaine treatment for opioid, stimulant, or alcohol addiction, the first step is a thorough medical and psychological evaluation to determine whether a flood dose protocol is appropriate for your specific situation.

At Psychedelic Connect, we help connect patients with accredited ibogaine treatment centers with experienced clinical teams. We’ll help you understand the protocol, assess your candidacy, and identify the program best suited to your needs.

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Frequently Asked Questions

How much ibogaine is a flood dose?

A flood dose is typically 10–25 mg/kg of body weight. For a 75 kg (165 lb) person, this means approximately 750mg–1,875mg of ibogaine. The exact dose is calculated individually based on weight, medical history, and the form of ibogaine being used.

How long does an ibogaine flood dose last?

The full experience lasts approximately 24–36 hours, with the most intense visionary phase in the first 8–12 hours. A residual stimulation and heightened sensitivity phase continues for the remainder. Most people do not sleep during the experience.

Is a flood dose dangerous?

A flood dose carries meaningful cardiac risk, which is why medical screening and supervision are non-negotiable. When administered after proper cardiac screening by trained clinical staff with monitoring and emergency equipment, ibogaine flood dosing is manageable and has a strong safety record at reputable clinics. The danger comes from unscreened, unsupervised, or self-administered use.

What is the difference between a flood dose and a booster dose?

A flood dose is the primary full treatment. A booster dose is a smaller subsequent dose — typically 5–10 mg/kg — administered days or weeks after the flood to extend the therapeutic window or address residual cravings. Not all programs include boosters; they’re more common in programs that also incorporate 5-MeO-DMT as part of the aftercare protocol.

Can I receive a flood dose if I’m on Suboxone?

Buprenorphine (Suboxone) blocks opioid receptors with high affinity and must be tapered before ibogaine treatment. Most clinics require patients to be off buprenorphine for at least 3–5 days before treatment, and some require longer clearance periods. A specific taper protocol should be developed with your prescribing physician in coordination with the treatment clinic.