Drug interactions
Prabotulinumtoxina + Promethazine
Severity: Minor
Prabotulinumtoxina and Promethazine: 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
Drugs with anticholinergic activity may potentiate the effects of botulinum toxin products. This could increase neuromuscular weakness and systemic anticholinergic effects, although the systemic exposure from cosmetic injection is low.
What this interaction means in plain words
Prabotulinumtoxina and Promethazine 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
Additive interference with cholinergic neuromuscular transmission.
What to do
Monitor for unusual muscle weakness, swallowing or breathing difficulty after injection. Consider the interaction more carefully if large doses are used.
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 Prabotulinumtoxina and Promethazine, 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 Promethazine
- Ibutilide + Promethazine Contraindicated
- Pimozide + Promethazine Contraindicated
- Promethazine + Thioridazine Contraindicated
- Alfentanil + Promethazine Major
- Amiodarone + Promethazine Major
- Amisulpride + Promethazine Major
Frequently asked questions
Can I take Prabotulinumtoxina with Promethazine?
MediHelp rates the interaction as minor. Prabotulinumtoxina and Promethazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Drugs with anticholinergic activity may potentiate the effects of botulinum toxin products. This could increase neuromuscular weakness and systemic anticholinergic effects, although the systemic exposure from cosmetic injection is low.
How serious is the interaction between Prabotulinumtoxina and Promethazine?
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 unusual muscle weakness, swallowing or breathing difficulty after injection. Consider the interaction more carefully if large doses are used.
What other medicines interact with Promethazine?
MediHelp also lists interactions of Promethazine with, for example, Ibutilide, Pimozide, Thioridazine. The full list is on the Promethazine 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.
