Drug interactions
Ciprofloxacin + Vemurafenib
Severity: Major
Ciprofloxacin and Vemurafenib: 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
Vemurafenib causes concentration-dependent QT prolongation, and ciprofloxacin adds to it. This increases the risk of torsades de pointes and sudden cardiac events.
What this interaction means in plain words
Ciprofloxacin and Vemurafenib 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.
Ciprofloxacin belongs to Anti Bacterial; Vemurafenib belongs to Oncology.
Why it happens
Additive pharmacodynamic QT prolongation.
What to do
Avoid the combination and choose another antibiotic. If unavoidable, monitor ECG and electrolytes regularly.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
Other interactions of Vemurafenib
Frequently asked questions
Can I take Ciprofloxacin with Vemurafenib?
MediHelp rates the interaction as major. Ciprofloxacin and Vemurafenib 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. Vemurafenib causes concentration-dependent QT prolongation, and ciprofloxacin adds to it. This increases the risk of torsades de pointes and sudden cardiac events.
How serious is the interaction between Ciprofloxacin and Vemurafenib?
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 and choose another antibiotic. If unavoidable, monitor ECG and electrolytes regularly.
What other medicines interact with Ciprofloxacin?
MediHelp also lists interactions of Ciprofloxacin with, for example, Agomelatine, Fezolinetant, Thioridazine. The full list is on the Ciprofloxacin page.
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