Drug interactions
Moxifloxacin + Vandetanib
Severity: Contraindicated
Moxifloxacin and Vandetanib: contraindicated interaction.
Last updated Sources: EMA SmPC
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
Vandetanib carries a boxed warning for QT prolongation, torsades de pointes and sudden death. Adding moxifloxacin, which also prolongs the QT interval, further increases this risk.
What this interaction means in plain words
Moxifloxacin and Vandetanib are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Moxifloxacin belongs to Anti Bacterial; Vandetanib belongs to Oncology.
Why it happens
Additive prolongation of ventricular repolarization through potassium channel inhibition.
What to do
Do not combine them; use a non-QT-prolonging antibiotic during vandetanib therapy. If an unavoidable situation arises, monitor ECGs and electrolytes closely.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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References
Other interactions of Moxifloxacin
- Amiodarone + Moxifloxacin Contraindicated
- Arsenic trioxide + Moxifloxacin Contraindicated
- Disopyramide + Moxifloxacin Contraindicated
- Dofetilide + Moxifloxacin Contraindicated
- Dronedarone + Moxifloxacin Contraindicated
- Droperidol + Moxifloxacin Contraindicated
Other interactions of Vandetanib
- Amiodarone + Vandetanib Contraindicated
- Amisulpride + Vandetanib Contraindicated
- Amitriptyline + Vandetanib Contraindicated
- Anagrelide + Vandetanib Contraindicated
- Asenapine + Vandetanib Contraindicated
- Chloroquine + Vandetanib Contraindicated
Frequently asked questions
Can I take Moxifloxacin with Vandetanib?
MediHelp rates the interaction as contraindicated. Moxifloxacin and Vandetanib are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Vandetanib carries a boxed warning for QT prolongation, torsades de pointes and sudden death. Adding moxifloxacin, which also prolongs the QT interval, further increases this risk.
How serious is the interaction between Moxifloxacin and Vandetanib?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not combine them; use a non-QT-prolonging antibiotic during vandetanib therapy. If an unavoidable situation arises, monitor ECGs and electrolytes closely.
What other medicines interact with Moxifloxacin?
MediHelp also lists interactions of Moxifloxacin with, for example, Amiodarone, Arsenic trioxide, Disopyramide. The full list is on the Moxifloxacin page.
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