Drug interactions
Brompheniramine + Rimabotulinumtoxinb
Severity: Moderate
Brompheniramine 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
Drugs with anticholinergic activity may add to the systemic anticholinergic effects of botulinum toxin, such as dry mouth, blurred vision and urinary retention. Label guidance also warns that other agents affecting neuromuscular function may increase the risk of excessive weakness. The clinical significance with a single oral antihistamine is likely modest.
What this interaction means in plain words
Brompheniramine 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.
Brompheniramine belongs to Respiratory; Rimabotulinumtoxinb belongs to Musculoskeletal.
Why it happens
Additive anticholinergic effects; botulinum toxin blocks acetylcholine release at the neuromuscular junction and autonomic synapses.
What to do
Monitor for generalized weakness, swallowing or breathing difficulty and anticholinergic symptoms after injection. Consider avoiding sedating antihistamines in patients with dysphagia or respiratory compromise.
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 Brompheniramine
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 Brompheniramine with Rimabotulinumtoxinb?
MediHelp rates the interaction as moderate. Brompheniramine 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. Drugs with anticholinergic activity may add to the systemic anticholinergic effects of botulinum toxin, such as dry mouth, blurred vision and urinary retention. Label guidance also warns that other agents affecting neuromuscular function may increase the risk of excessive weakness. The clinical significance with a single oral antihistamine is likely modest.
How serious is the interaction between Brompheniramine 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 generalized weakness, swallowing or breathing difficulty and anticholinergic symptoms after injection. Consider avoiding sedating antihistamines in patients with dysphagia or respiratory compromise.
What other medicines interact with Brompheniramine?
MediHelp also lists interactions of Brompheniramine with, for example, Alfentanil, Belladonna and opium, Benzhydrocodone / acetaminophen. The full list is on the Brompheniramine page.
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