Drug interactions
Baclofen + Rimabotulinumtoxinb
Severity: Moderate
Baclofen and Rimabotulinumtoxinb: 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
Baclofen is a muscle relaxant and rimabotulinumtoxinB weakens muscles by blocking acetylcholine release, so the combination may increase weakness. Excessive generalized weakness, swallowing or breathing problems are possible, particularly if toxin spread occurs.
What this interaction means in plain words
Baclofen and Rimabotulinumtoxinb 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.
Baclofen belongs to Musculoskeletal; Rimabotulinumtoxinb belongs to Musculoskeletal.
Why it happens
Additive pharmacodynamic muscle weakness: central muscle relaxation from baclofen plus peripheral neuromuscular blockade from the toxin.
What to do
Monitor for excessive weakness, dysphagia and respiratory difficulty after toxin injection. Consider reducing the baclofen dose or the toxin dose if weakness is excessive.
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 Baclofen
Other interactions of Rimabotulinumtoxinb
- Amikacin + Rimabotulinumtoxinb Moderate
- Amitriptyline + Rimabotulinumtoxinb Moderate
- Atracurium + Rimabotulinumtoxinb Moderate
- Atropine + Rimabotulinumtoxinb Moderate
- Benztropine + Rimabotulinumtoxinb Moderate
- Brompheniramine + Rimabotulinumtoxinb Moderate
Frequently asked questions
Can I take Baclofen with Rimabotulinumtoxinb?
MediHelp rates the interaction as moderate. Baclofen and Rimabotulinumtoxinb 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. Baclofen is a muscle relaxant and rimabotulinumtoxinB weakens muscles by blocking acetylcholine release, so the combination may increase weakness. Excessive generalized weakness, swallowing or breathing problems are possible, particularly if toxin spread occurs.
How serious is the interaction between Baclofen and Rimabotulinumtoxinb?
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 for excessive weakness, dysphagia and respiratory difficulty after toxin injection. Consider reducing the baclofen dose or the toxin dose if weakness is excessive.
What other medicines interact with Baclofen?
MediHelp also lists interactions of Baclofen with, for example, Alfentanil, Amobarbital, Belladonna and opium. The full list is on the Baclofen page.
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