Drug interactions
Dabrafenib + Sofosbuvir-velpatasvir
Severity: Major
Dabrafenib and Sofosbuvir-velpatasvir: 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
Dabrafenib induces CYP3A4, CYP2C8 and probably P-gp, which can lower velpatasvir and sofosbuvir concentrations. This may reduce antiviral efficacy and risk treatment failure or resistance.
What this interaction means in plain words
Dabrafenib and Sofosbuvir-velpatasvir 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.
Dabrafenib belongs to Oncology; Sofosbuvir-velpatasvir belongs to Anti Virals.
Why it happens
Dabrafenib induces CYP3A4/CYP2C8/CYP2B6 and P-gp, increasing clearance of velpatasvir and sofosbuvir.
What to do
Avoid coadministration and use an alternative HCV regimen or defer HCV therapy. If it cannot be avoided, monitor HCV RNA.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dabrafenib and Sofosbuvir-velpatasvir, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Sofosbuvir-velpatasvir
- Rifampin + Sofosbuvir-velpatasvir Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir Contraindicated
- Sofosbuvir-velpatasvir + St john's wort Contraindicated
- Amiodarone + Sofosbuvir-velpatasvir Major
- Apalutamide + Sofosbuvir-velpatasvir Major
- Carbamazepine + Sofosbuvir-velpatasvir Major
Other interactions of Dabrafenib
Frequently asked questions
Can I take Dabrafenib with Sofosbuvir-velpatasvir?
MediHelp rates the interaction as major. Dabrafenib and Sofosbuvir-velpatasvir 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. Dabrafenib induces CYP3A4, CYP2C8 and probably P-gp, which can lower velpatasvir and sofosbuvir concentrations. This may reduce antiviral efficacy and risk treatment failure or resistance.
How serious is the interaction between Dabrafenib and Sofosbuvir-velpatasvir?
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 coadministration and use an alternative HCV regimen or defer HCV therapy. If it cannot be avoided, monitor HCV RNA.
What other medicines interact with Sofosbuvir-velpatasvir?
MediHelp also lists interactions of Sofosbuvir-velpatasvir with, for example, Rifampin, Rifapentine, St john's wort. The full list is on the Sofosbuvir-velpatasvir page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
