Drug interactions
Octreotide + Vandetanib
Severity: Major
Octreotide 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 carries a boxed warning for QT prolongation, torsades de pointes and sudden death. Octreotide may add to this through bradycardia and conduction effects, and the combination is discouraged.
What this interaction means in plain words
Octreotide 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.
Octreotide belongs to Endocrine; Vandetanib belongs to Oncology.
Why it happens
Additive pharmacodynamic QT prolongation.
What to do
Avoid the combination if possible. If both are needed, monitor ECG and electrolytes frequently and keep potassium, magnesium and calcium normal.
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 Octreotide
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 Octreotide with Vandetanib?
MediHelp rates the interaction as major. Octreotide 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 carries a boxed warning for QT prolongation, torsades de pointes and sudden death. Octreotide may add to this through bradycardia and conduction effects, and the combination is discouraged.
How serious is the interaction between Octreotide 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 both are needed, monitor ECG and electrolytes frequently and keep potassium, magnesium and calcium normal.
What other medicines interact with Octreotide?
MediHelp also lists interactions of Octreotide with, for example, Adagrasib, Amisulpride, Arsenic trioxide. The full list is on the Octreotide page.
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