Drug interactions
Leuprolide + Vandetanib
Severity: Major
Leuprolide 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
Vandetanib has a boxed warning for QT prolongation, sudden death and torsades de pointes, and leuprolide may add to this effect. The combination markedly increases arrhythmic risk.
What this interaction means in plain words
Leuprolide 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.
Leuprolide belongs to Endocrine; Vandetanib belongs to Oncology.
Why it happens
Additive QT prolongation from androgen deprivation (leuprolide) and vandetanib effects on cardiac repolarization.
What to do
Avoid the combination if possible. If it cannot be avoided, monitor the ECG and electrolytes frequently and reduce or interrupt vandetanib if the QTc increases.
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 Leuprolide
- Leuprolide + Pimozide Contraindicated
- Leuprolide + Thioridazine Contraindicated
- Amisulpride + Leuprolide Major
- Arsenic trioxide + Leuprolide Major
- Artemether / lumefantrine + Leuprolide Major
- Disopyramide + Leuprolide 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 Leuprolide with Vandetanib?
MediHelp rates the interaction as major. Leuprolide 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. Vandetanib has a boxed warning for QT prolongation, sudden death and torsades de pointes, and leuprolide may add to this effect. The combination markedly increases arrhythmic risk.
How serious is the interaction between Leuprolide 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 the combination if possible. If it cannot be avoided, monitor the ECG and electrolytes frequently and reduce or interrupt vandetanib if the QTc increases.
What other medicines interact with Leuprolide?
MediHelp also lists interactions of Leuprolide with, for example, Pimozide, Thioridazine, Amisulpride. The full list is on the Leuprolide page.
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