Drug interactions
Chlorzoxazone + Rimabotulinumtoxinb
Severity: Minor
Chlorzoxazone and Rimabotulinumtoxinb: 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
Centrally acting muscle relaxants may add to the weakening effect of botulinum toxin. This could result in more pronounced muscle weakness, though a clear interaction is not well documented for chlorzoxazone.
What this interaction means in plain words
Chlorzoxazone and Rimabotulinumtoxinb have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Chlorzoxazone belongs to Musculoskeletal; Rimabotulinumtoxinb belongs to Musculoskeletal.
Why it happens
Possible additive muscle weakness; chlorzoxazone acts centrally while the toxin blocks acetylcholine release at the neuromuscular junction.
What to do
Monitor for excessive weakness or swallowing and breathing difficulty after injection. Reassess the muscle relaxant dose if weakness is excessive.
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?
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Other interactions of Chlorzoxazone
Other interactions of Rimabotulinumtoxinb
- Amikacin + Rimabotulinumtoxinb Moderate
- Amitriptyline + Rimabotulinumtoxinb Moderate
- Atracurium + Rimabotulinumtoxinb Moderate
- Atropine + Rimabotulinumtoxinb Moderate
- Baclofen + Rimabotulinumtoxinb Moderate
- Benztropine + Rimabotulinumtoxinb Moderate
Frequently asked questions
Can I take Chlorzoxazone with Rimabotulinumtoxinb?
MediHelp rates the interaction as minor. Chlorzoxazone and Rimabotulinumtoxinb have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Centrally acting muscle relaxants may add to the weakening effect of botulinum toxin. This could result in more pronounced muscle weakness, though a clear interaction is not well documented for chlorzoxazone.
How serious is the interaction between Chlorzoxazone and Rimabotulinumtoxinb?
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 for excessive weakness or swallowing and breathing difficulty after injection. Reassess the muscle relaxant dose if weakness is excessive.
What other medicines interact with Chlorzoxazone?
MediHelp also lists interactions of Chlorzoxazone with, for example, Alfentanil, Alprazolam, Amobarbital. The full list is on the Chlorzoxazone page.
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