Drug interactions
Buprenorphine + Loperamide
Severity: Major
Buprenorphine 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 drugs have QT-prolonging potential and combining them may raise arrhythmia risk. Loperamide at high doses also causes opioid effects and central depression when exposure is increased.
What this interaction means in plain words
Buprenorphine 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.
Buprenorphine belongs to Musculoskeletal; Loperamide belongs to Gastrointestinal Tract.
Why it happens
Additive QT prolongation; both are opioid receptor agonists.
What to do
Avoid supratherapeutic loperamide use and obtain a baseline ECG in at-risk patients. Correct electrolytes and monitor for QT prolongation.
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 Buprenorphine
- Alvimopan + Buprenorphine Contraindicated
- Buprenorphine + Calcium / magnesium / potassium / sodium oxybates Contraindicated
- Buprenorphine + Olanzapine / samidorphan Contraindicated
- Buprenorphine + Phenelzine Contraindicated
- Buprenorphine + Pimozide Contraindicated
- Buprenorphine + Thioridazine Contraindicated
Frequently asked questions
Can I take Buprenorphine with Loperamide?
MediHelp rates the interaction as major. Buprenorphine 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 drugs have QT-prolonging potential and combining them may raise arrhythmia risk. Loperamide at high doses also causes opioid effects and central depression when exposure is increased.
How serious is the interaction between Buprenorphine 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 supratherapeutic loperamide use and obtain a baseline ECG in at-risk patients. Correct electrolytes and monitor for QT prolongation.
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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