Drug interactions
Oxcarbazepine + Vandetanib
Severity: Major
Oxcarbazepine and Vandetanib: major 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
Oxcarbazepine may reduce vandetanib exposure through CYP3A4 induction, potentially compromising antitumor efficacy. Vandetanib has a narrow therapeutic margin and QT-related risks, so dose changes to compensate are difficult.
What this interaction means in plain words
Oxcarbazepine and Vandetanib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Oxcarbazepine belongs to Central Nervous System; Vandetanib belongs to Oncology.
Why it happens
Oxcarbazepine induces CYP3A4, accelerating vandetanib metabolism and lowering plasma levels.
What to do
Avoid concurrent use where possible and choose an antiseizure drug without enzyme induction. If unavoidable, monitor for loss of tumor response and follow ECG and electrolytes closely.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Oxcarbazepine
- Cabotegravir + Oxcarbazepine Contraindicated
- Oxcarbazepine + Rilpivirine Contraindicated
- Artemether / lumefantrine + Oxcarbazepine Major
- Atazanavir + Oxcarbazepine Major
- Benzhydrocodone / acetaminophen + Oxcarbazepine Major
- Bictegravir + Oxcarbazepine Major
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 Oxcarbazepine with Vandetanib?
MediHelp rates the interaction as major. Oxcarbazepine and Vandetanib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Oxcarbazepine may reduce vandetanib exposure through CYP3A4 induction, potentially compromising antitumor efficacy. Vandetanib has a narrow therapeutic margin and QT-related risks, so dose changes to compensate are difficult.
How serious is the interaction between Oxcarbazepine and Vandetanib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use where possible and choose an antiseizure drug without enzyme induction. If unavoidable, monitor for loss of tumor response and follow ECG and electrolytes closely.
What other medicines interact with Oxcarbazepine?
MediHelp also lists interactions of Oxcarbazepine with, for example, Cabotegravir, Rilpivirine, Artemether / lumefantrine. The full list is on the Oxcarbazepine page.
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