Drug interactions
Sorafenib + Vemurafenib
Severity: Moderate
Sorafenib and Vemurafenib: moderate 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
Both drugs can prolong the QT interval, and vemurafenib's effect is concentration dependent. Co-administration may increase the risk of serious ventricular arrhythmias, especially with electrolyte abnormalities.
What this interaction means in plain words
Sorafenib and Vemurafenib can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Sorafenib belongs to Oncology; Vemurafenib belongs to Oncology.
Why it happens
Additive pharmacodynamic QT prolongation.
What to do
Perform an ECG and check electrolytes at baseline and periodically during treatment. Correct potassium and magnesium disturbances and interrupt or reduce doses if the QTc becomes markedly prolonged.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Sorafenib
Other interactions of Vemurafenib
Frequently asked questions
Can I take Sorafenib with Vemurafenib?
MediHelp rates the interaction as moderate. Sorafenib and Vemurafenib can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both drugs can prolong the QT interval, and vemurafenib's effect is concentration dependent. Co-administration may increase the risk of serious ventricular arrhythmias, especially with electrolyte abnormalities.
How serious is the interaction between Sorafenib and Vemurafenib?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Perform an ECG and check electrolytes at baseline and periodically during treatment. Correct potassium and magnesium disturbances and interrupt or reduce doses if the QTc becomes markedly prolonged.
What other medicines interact with Sorafenib?
MediHelp also lists interactions of Sorafenib with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Sorafenib page.
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