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Major risk

Ibogaine and Hydroxychloroquine

Also known as: Plaquenil, Hcq

Recognised QT-prolonging agent, additive with ibogaine's hERG effect. Its terminal half-life is measured in WEEKS, so a washout of a few days achieves essentially nothing and a normal-looking gap since the last dose is not evidence of clearance. Usually prescribed for lupus or rheumatoid arthritis, where stopping it carries its own risk of a disease flare.

Severity

Major risk

Mechanism

QT-interval prolongation

Protocol Status

Continue as prescribed — cleared by a measured lab value, not a waiting period

Restart Delay

Physician discretion

What "Major risk" Means

Serious clinical risk requiring physician-led tapering, washout, and monitoring. Treatment may proceed once the medication is appropriately cleared or transitioned.

Clinical Action

What our medical team does for patients on Hydroxychloroquine.

Do not stop it on our initiative — the condition it treats usually outranks the interaction and a short hold would not clear it anyway. Assess readiness by ECG rather than by elapsed days: baseline QTc, and correct electrolytes to protocol target before dosing.

Where the Washout Happens

Continue as prescribed — cleared by a measured lab value, not a waiting period

This medication is not stopped for treatment, and should not be stopped on our initiative — the condition it treats usually outranks the interaction. What it changes is monitoring: serum potassium and magnesium are measured before the flood dose and corrected to target, and the dose is deferred until those numbers are right rather than until a number of days have passed. Any change to the prescription belongs to the prescribing physician.

Post-Treatment Restart

Restart at physician discretion once acute window closes.

The Pharmacology

How Hydroxychloroquine interacts with ibogaine: qt-interval prolongation.

Ibogaine and noribogaine block the cardiac hERG (IKr) potassium channel, which lengthens ventricular repolarisation and the QTc interval on a 12-lead EKG. Adding a second QT-prolonging drug compounds the effect and raises the risk of torsades de pointes — a polymorphic ventricular tachycardia that can be fatal. Every patient receives a baseline EKG, electrolyte panel, and continuous cardiac monitoring; medications in this class must be washed out long enough to return QTc into a safe range.

Same Mechanism

Other medications that interact via qt-interval prolongation.

Contraindicated

Citalopram

Celexa

Contraindicated

Escitalopram

Lexapro

Contraindicated

Amiodarone

Cordarone, Pacerone

Contraindicated

Sotalol

Betapace, Sorine

Contraindicated

Dofetilide

Tikosyn

Contraindicated

Dronedarone

Multaq

Same Severity Tier

Other major risk medications (different mechanism).

Opioid receptor potentiation

Methadone

Methadose, Dolophine

Opioid receptor potentiation

Buprenorphine

Suboxone, Subutex

Opioid receptor potentiation

Fentanyl

Duragesic, Sublimaze

Opioid receptor potentiation

Oxycodone

Oxycontin, Percocet

Opioid receptor potentiation

Hydrocodone

Vicodin, Norco

Opioid receptor potentiation

Morphine

Ms Contin, Kadian

Common Questions

Hydroxychloroquine and ibogaine treatment.

Can I take ibogaine if I am on Hydroxychloroquine?

Major risk. Recognised QT-prolonging agent, additive with ibogaine's hERG effect. Its terminal half-life is measured in WEEKS, so a washout of a few days achieves essentially nothing and a normal-looking gap since the last dose is not evidence of clearance. Usually prescribed for lupus or rheumatoid arthritis, where stopping it carries its own risk of a disease flare. Do not stop it on our initiative — the condition it treats usually outranks the interaction and a short hold would not clear it anyway. Assess readiness by ECG rather than by elapsed days: baseline QTc, and correct electrolytes to protocol target before dosing.

How long do I need to be off Hydroxychloroquine before ibogaine treatment?

Continue as prescribed — cleared by a measured lab value, not a waiting period. This medication is not stopped for treatment, and should not be stopped on our initiative — the condition it treats usually outranks the interaction. What it changes is monitoring: serum potassium and magnesium are measured before the flood dose and corrected to target, and the dose is deferred until those numbers are right rather than until a number of days have passed. Any change to the prescription belongs to the prescribing physician.

What is the mechanism of the interaction?

QT-interval prolongation. Ibogaine and noribogaine block the cardiac hERG (IKr) potassium channel, which lengthens ventricular repolarisation and the QTc interval on a 12-lead EKG. Adding a second QT-prolonging drug compounds the effect and raises the risk of torsades de pointes — a polymorphic ventricular tachycardia that can be fatal. Every patient receives a baseline EKG, electrolyte panel, and continuous cardiac monitoring; medications in this class must be washed out long enough to return QTc into a safe range.

Can I switch to a different medication so I can have ibogaine treatment?

In many cases yes. Our medical team works with your prescribing physician to taper or substitute medications safely before treatment. The right substitution depends on the underlying condition you are treating with Hydroxychloroquine — contact us for an individual review.

Checking more than one medication? Use the interactive Drug Interaction Checker to screen your full medication list at once.

Browse all 145 medications in the A–Z directory.

DA
Medically reviewed by Dr. Arellano, M.D.
Clinical Director, MindScape Retreat · Board-certified physician specializing in ibogaine-assisted detoxification with over 1,000 patients treated.
Last reviewed: May 2026 · See full medical team
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