Drug interactions
Pancuronium + Polymyxin b
Severity: Major
Pancuronium and Polymyxin b: 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
Polymyxin B has neuromuscular blocking properties and can enhance and prolong pancuronium paralysis. This may cause delayed recovery, respiratory depression or apnea, and reversal with anticholinesterases may be incomplete.
What this interaction means in plain words
Pancuronium and Polymyxin b 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.
Pancuronium belongs to Musculoskeletal; Polymyxin b belongs to Anti Bacterial.
Why it happens
Polymyxin B blocks prejunctional acetylcholine release and stabilizes the postsynaptic membrane, adding to nondepolarizing blockade.
What to do
Avoid concurrent use if alternatives exist; otherwise reduce pancuronium dosing, monitor with train-of-four and ensure prolonged ventilatory support is available.
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 Pancuronium
Other interactions of Polymyxin b
- Cidofovir + Polymyxin b Contraindicated
- Colistin + Polymyxin b Contraindicated
- Acyclovir + Polymyxin b Major
- Adefovir + Polymyxin b Major
- Amikacin + Polymyxin b Major
- Amphotericin b + Polymyxin b Major
Frequently asked questions
Can I take Pancuronium with Polymyxin b?
MediHelp rates the interaction as major. Pancuronium and Polymyxin b 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. Polymyxin B has neuromuscular blocking properties and can enhance and prolong pancuronium paralysis. This may cause delayed recovery, respiratory depression or apnea, and reversal with anticholinesterases may be incomplete.
How serious is the interaction between Pancuronium and Polymyxin b?
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 concurrent use if alternatives exist; otherwise reduce pancuronium dosing, monitor with train-of-four and ensure prolonged ventilatory support is available.
What other medicines interact with Pancuronium?
MediHelp also lists interactions of Pancuronium with, for example, Amikacin, Bacitracin-neomycin-polymyxin, Capreomycin. The full list is on the Pancuronium page.
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