Drug interactions
Physostigmine + Vecuronium
Severity: Moderate
Physostigmine and Vecuronium: 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
Physostigmine inhibits acetylcholinesterase and can antagonize non-depolarizing neuromuscular blockade, though it is not used for reversal because of its central and muscarinic effects. It may reduce the effect of vecuronium in unpredictable ways.
What this interaction means in plain words
Physostigmine and Vecuronium 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.
Why it happens
Reversible acetylcholinesterase inhibition raises acetylcholine at the neuromuscular junction and competes with vecuronium.
What to do
Monitor neuromuscular function with train-of-four if physostigmine is given perioperatively, and use standard reversal agents (sugammadex or neostigmine) when reversal is needed. Watch for cholinergic effects such as bradycardia and secretions.
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 Vecuronium
Frequently asked questions
Can I take Physostigmine with Vecuronium?
MediHelp rates the interaction as moderate. Physostigmine and Vecuronium 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. Physostigmine inhibits acetylcholinesterase and can antagonize non-depolarizing neuromuscular blockade, though it is not used for reversal because of its central and muscarinic effects. It may reduce the effect of vecuronium in unpredictable ways.
How serious is the interaction between Physostigmine and Vecuronium?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor neuromuscular function with train-of-four if physostigmine is given perioperatively, and use standard reversal agents (sugammadex or neostigmine) when reversal is needed. Watch for cholinergic effects such as bradycardia and secretions.
What other medicines interact with Vecuronium?
MediHelp also lists interactions of Vecuronium with, for example, Amikacin, Bacitracin-neomycin-polymyxin, Capreomycin. The full list is on the Vecuronium page.
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