Drug interactions
Phenobarbital + Vecuronium
Severity: Minor
Phenobarbital and Vecuronium: minor 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
Chronic phenobarbital therapy may reduce the effect of vecuronium, so blockade may be shorter or higher doses may be needed. The effect is generally modest.
What this interaction means in plain words
Phenobarbital and Vecuronium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Enzyme induction may increase vecuronium clearance, and receptor upregulation may add resistance; the exact mechanism is not firmly established.
What to do
Monitor neuromuscular blockade with train-of-four and increase vecuronium dosing if needed in patients on long-term phenobarbital.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Phenobarbital and Vecuronium, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Vecuronium
Frequently asked questions
Can I take Phenobarbital with Vecuronium?
MediHelp rates the interaction as minor. Phenobarbital and Vecuronium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Chronic phenobarbital therapy may reduce the effect of vecuronium, so blockade may be shorter or higher doses may be needed. The effect is generally modest.
How serious is the interaction between Phenobarbital and Vecuronium?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor neuromuscular blockade with train-of-four and increase vecuronium dosing if needed in patients on long-term phenobarbital.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
