Drug interactions
OnabotulinumtoxinA + Rocuronium
Severity: Moderate
OnabotulinumtoxinA and Rocuronium: 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
Botulinum toxin weakens muscles by blocking acetylcholine release, so neuromuscular blockers given near the time of injection may add to this weakness. Excessive generalized or local muscle weakness, including effects on swallowing or breathing, is possible.
What this interaction means in plain words
OnabotulinumtoxinA and Rocuronium 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.
OnabotulinumtoxinA belongs to Musculoskeletal; Rocuronium belongs to Musculoskeletal.
Why it happens
Additive neuromuscular blockade: presynaptic inhibition of acetylcholine release by the toxin plus postsynaptic nicotinic receptor antagonism by rocuronium.
What to do
Monitor neuromuscular function closely, with train-of-four monitoring perioperatively, in patients recently treated with botulinum toxin. Reduce the rocuronium dose as guided by monitoring and be prepared to provide ventilatory support.
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 Rocuronium
Other interactions of OnabotulinumtoxinA
Frequently asked questions
Can I take OnabotulinumtoxinA with Rocuronium?
MediHelp rates the interaction as moderate. OnabotulinumtoxinA and Rocuronium 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. Botulinum toxin weakens muscles by blocking acetylcholine release, so neuromuscular blockers given near the time of injection may add to this weakness. Excessive generalized or local muscle weakness, including effects on swallowing or breathing, is possible.
How serious is the interaction between OnabotulinumtoxinA and Rocuronium?
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 closely, with train-of-four monitoring perioperatively, in patients recently treated with botulinum toxin. Reduce the rocuronium dose as guided by monitoring and be prepared to provide ventilatory support.
What other medicines interact with Rocuronium?
MediHelp also lists interactions of Rocuronium with, for example, Amikacin, Bacitracin-neomycin-polymyxin, Capreomycin. The full list is on the Rocuronium page.
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