Citalopram
Celexa
Ibogaine and Loperamide
Also known as: Imodium, Imodium Ad, Anti-Diarrheal, Lope
At supratherapeutic ('lope') doses used to self-treat opioid withdrawal, loperamide is a potent hERG blocker causing QTc prolongation, QRS widening, severe bradycardia, torsades and cardiac arrest (FDA Drug Safety Communication; FAERS 252 deaths). Abusers frequently co-ingest CYP3A4/P-gp inhibitors — grapefruit, cimetidine, quinine — specifically to raise CNS penetration, which also raises cardiac exposure. Elimination is markedly prolonged after overdose, so a time-based washout alone is not sufficient evidence of clearance. Occasional therapeutic 2 mg dosing is a far lower concern than the abuse pattern.
Severity
Major risk
Mechanism
QT-interval prolongation
Protocol Status
Pre-arrival washout (under your prescribing physician)
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 Loperamide.
Ask EVERY opioid-history patient about loperamide by name and by brand ('Imodium'), including quantity per day — self-treatment doses of 50-200+ mg/day are reported and patients rarely disclose it unprompted. Any supratherapeutic use requires a baseline ECG and defers the flood dose until QTc and QRS have normalised on a repeat tracing, not merely until a number of days have passed. Check K+/Mg2+ alongside.
Where the Washout Happens
Pre-arrival washout (under your prescribing physician)
Discontinuation is completed before arrival, under the patient's own prescribing physician, with the medication-specific washout interval observed before the flood dose.
Pre-Treatment Washout Window
7 days minimum before treatment.
Post-Treatment Restart
Restart at physician discretion once acute window closes.
The Pharmacology
How Loperamide 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.
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
Loperamide and ibogaine treatment.
Can I take ibogaine if I am on Loperamide?
Major risk. At supratherapeutic ('lope') doses used to self-treat opioid withdrawal, loperamide is a potent hERG blocker causing QTc prolongation, QRS widening, severe bradycardia, torsades and cardiac arrest (FDA Drug Safety Communication; FAERS 252 deaths). Abusers frequently co-ingest CYP3A4/P-gp inhibitors — grapefruit, cimetidine, quinine — specifically to raise CNS penetration, which also raises cardiac exposure. Elimination is markedly prolonged after overdose, so a time-based washout alone is not sufficient evidence of clearance. Occasional therapeutic 2 mg dosing is a far lower concern than the abuse pattern. Ask EVERY opioid-history patient about loperamide by name and by brand ('Imodium'), including quantity per day — self-treatment doses of 50-200+ mg/day are reported and patients rarely disclose it unprompted. Any supratherapeutic use requires a baseline ECG and defers the flood dose until QTc and QRS have normalised on a repeat tracing, not merely until a number of days have passed. Check K+/Mg2+ alongside.
How long do I need to be off Loperamide before ibogaine treatment?
Pre-arrival washout (under your prescribing physician). Discontinuation is completed before arrival, under the patient's own prescribing physician, with the medication-specific washout interval observed before the flood dose. 7 days minimum before treatment.
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 Loperamide — contact us for an individual review.
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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