Drug interactions
Asenapine + Loperamide
Severity: Major
Asenapine and Loperamide: major 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
Both can prolong the QT interval, so combining them may increase the risk of torsades de pointes. Risk is greatest with overdose or high-dose loperamide.
What this interaction means in plain words
Asenapine and Loperamide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Asenapine belongs to Central Nervous System; Loperamide belongs to Gastrointestinal Tract.
Why it happens
Additive QT prolongation via cardiac potassium channel blockade.
What to do
Avoid if possible and use standard loperamide doses only. Check ECG and electrolytes if coadministered.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Loperamide
Other interactions of Asenapine
- Asenapine + Pimozide Contraindicated
- Asenapine + Thioridazine Contraindicated
- Asenapine + Vandetanib Contraindicated
- Adagrasib + Asenapine Major
- Alfentanil + Asenapine Major
- Alfuzosin + Asenapine Major
Frequently asked questions
Can I take Asenapine with Loperamide?
MediHelp rates the interaction as major. Asenapine and Loperamide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both can prolong the QT interval, so combining them may increase the risk of torsades de pointes. Risk is greatest with overdose or high-dose loperamide.
How serious is the interaction between Asenapine and Loperamide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid if possible and use standard loperamide doses only. Check ECG and electrolytes if coadministered.
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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