Drug interactions
Loperamide + Sevoflurane
Severity: Moderate
Loperamide and Sevoflurane: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Sevoflurane can prolong the QT interval, and loperamide at supratherapeutic exposure has been associated with QT prolongation and torsades de pointes. Combined use may add to arrhythmia risk, particularly with excessive loperamide intake or electrolyte disturbance.
What this interaction means in plain words
Loperamide and Sevoflurane can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Loperamide belongs to Gastrointestinal Tract; Sevoflurane belongs to Central Nervous System.
Why it happens
Additive QT prolongation via cardiac repolarization effects.
What to do
Review loperamide intake before anesthesia and avoid high doses. Monitor ECG intraoperatively and correct potassium and magnesium in patients with other QT risk factors.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Loperamide
Other interactions of Sevoflurane
Frequently asked questions
Can I take Loperamide with Sevoflurane?
MediHelp rates the interaction as moderate. Loperamide and Sevoflurane can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Sevoflurane can prolong the QT interval, and loperamide at supratherapeutic exposure has been associated with QT prolongation and torsades de pointes. Combined use may add to arrhythmia risk, particularly with excessive loperamide intake or electrolyte disturbance.
How serious is the interaction between Loperamide and Sevoflurane?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Review loperamide intake before anesthesia and avoid high doses. Monitor ECG intraoperatively and correct potassium and magnesium in patients with other QT risk factors.
What other medicines interact with Loperamide?
MediHelp also lists interactions of Loperamide with, for example, Amiodarone, Amisulpride, Anagrelide. The full list is on the Loperamide page.
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