Bumetanide
Bumex, Burinex
Also known as: Lasix, Frusemide
Loop diuretics waste both potassium and magnesium at the loop of Henle, and hypokalaemia lengthens the QT interval directly. Magnesium loss matters twice over here: hypokalaemia is often REFRACTORY to potassium replacement until magnesium is corrected first, so a K+ that will not come up is frequently an unmeasured Mg2+ problem. Loop diuretic use is also a scored element of the Tisdale QT risk score in its own right.
Severity
Major risk
Mechanism
Electrolyte disturbance
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
Do NOT stop a loop diuretic on our initiative — the condition it treats usually outranks this interaction. Measure serum K+ AND Mg2+ before dosing and correct BOTH to protocol target, magnesium first. Recheck after correction rather than assuming repletion worked.
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
QTc is exquisitely sensitive to potassium and magnesium. Diuretics, laxatives, and conditions that lower these electrolytes lengthen QT and add to ibogaine's hERG effect. Pre-treatment electrolyte panels and IV repletion are routine.
Same Mechanism
Same Severity Tier
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Common Questions
Major risk. Loop diuretics waste both potassium and magnesium at the loop of Henle, and hypokalaemia lengthens the QT interval directly. Magnesium loss matters twice over here: hypokalaemia is often REFRACTORY to potassium replacement until magnesium is corrected first, so a K+ that will not come up is frequently an unmeasured Mg2+ problem. Loop diuretic use is also a scored element of the Tisdale QT risk score in its own right. Do NOT stop a loop diuretic on our initiative — the condition it treats usually outranks this interaction. Measure serum K+ AND Mg2+ before dosing and correct BOTH to protocol target, magnesium first. Recheck after correction rather than assuming repletion worked.
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.
Electrolyte disturbance. QTc is exquisitely sensitive to potassium and magnesium. Diuretics, laxatives, and conditions that lower these electrolytes lengthen QT and add to ibogaine's hERG effect. Pre-treatment electrolyte panels and IV repletion are routine.
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 Furosemide — 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.
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