Drug interactions
Dabrafenib + Norethisterone
Severity: Major
Dabrafenib and Norethisterone: 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 and may lower hormonal contraceptive exposure. Contraceptive failure is possible, and labeling advises non-hormonal methods.
What this interaction means in plain words
Dabrafenib and Norethisterone 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; Norethisterone belongs to Endocrine.
Why it happens
Dabrafenib induces CYP3A4 and other enzymes, increasing progestin clearance.
What to do
Use an effective non-hormonal contraceptive method during dabrafenib therapy and for a period after discontinuation.
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 Norethisterone
- Acitretin + Norethisterone Contraindicated
- Amobarbital + Norethisterone Major
- Apalutamide + Norethisterone Major
- Belzutifan + Norethisterone Major
- Bosentan + Norethisterone Major
- Brigatinib + Norethisterone Major
Other interactions of Dabrafenib
Frequently asked questions
Can I take Dabrafenib with Norethisterone?
MediHelp rates the interaction as major. Dabrafenib and Norethisterone 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 and may lower hormonal contraceptive exposure. Contraceptive failure is possible, and labeling advises non-hormonal methods.
How serious is the interaction between Dabrafenib and Norethisterone?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use an effective non-hormonal contraceptive method during dabrafenib therapy and for a period after discontinuation.
What other medicines interact with Norethisterone?
MediHelp also lists interactions of Norethisterone with, for example, Acitretin, Amobarbital, Apalutamide. The full list is on the Norethisterone page.
Full monographs, dosing and an interaction checker in the MediHelp app
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