Drug interactions
Lenvatinib + Primaquine
Severity: Major
Lenvatinib and Primaquine: 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
Lenvatinib can prolong the QT interval, and primaquine may add to this effect. The combination may increase the risk of torsades de pointes.
What this interaction means in plain words
Lenvatinib and Primaquine 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.
Lenvatinib belongs to Oncology; Primaquine belongs to Anti Parasitic.
Why it happens
Additive QT prolongation.
What to do
Avoid if an alternative exists. If coadministered, monitor the ECG and correct potassium, magnesium and calcium.
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 Primaquine
- Pimozide + Primaquine Contraindicated
- Amiodarone + Primaquine Major
- Amisulpride + Primaquine Major
- Anagrelide + Primaquine Major
- Arsenic trioxide + Primaquine Major
- Asenapine + Primaquine Major
Other interactions of Lenvatinib
- Amiodarone + Lenvatinib Major
- Amisulpride + Lenvatinib Major
- Asenapine + Lenvatinib Major
- Chlorpromazine + Lenvatinib Major
- Donepezil + Lenvatinib Major
- Haloperidol + Lenvatinib Major
Frequently asked questions
Can I take Lenvatinib with Primaquine?
MediHelp rates the interaction as major. Lenvatinib and Primaquine 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. Lenvatinib can prolong the QT interval, and primaquine may add to this effect. The combination may increase the risk of torsades de pointes.
How serious is the interaction between Lenvatinib and Primaquine?
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 if an alternative exists. If coadministered, monitor the ECG and correct potassium, magnesium and calcium.
What other medicines interact with Primaquine?
MediHelp also lists interactions of Primaquine with, for example, Pimozide, Amiodarone, Amisulpride. The full list is on the Primaquine page.
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