Drug interactions
Danazol + Flutamide
Severity: Moderate
Danazol and Flutamide: 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
Danazol is a CYP3A4 inhibitor and may increase flutamide exposure. In addition, danazol is an androgen and would oppose the intended antiandrogen effect of flutamide.
What this interaction means in plain words
Danazol and Flutamide 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.
Why it happens
Danazol inhibits CYP3A4 and has pharmacodynamic androgenic activity opposing flutamide.
What to do
Avoid the combination where possible because their effects are opposed. If used, monitor liver function tests.
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 Flutamide
Frequently asked questions
Can I take Danazol with Flutamide?
MediHelp rates the interaction as moderate. Danazol and Flutamide 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. Danazol is a CYP3A4 inhibitor and may increase flutamide exposure. In addition, danazol is an androgen and would oppose the intended antiandrogen effect of flutamide.
How serious is the interaction between Danazol and Flutamide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible because their effects are opposed. If used, monitor liver function tests.
What other medicines interact with Flutamide?
MediHelp also lists interactions of Flutamide with, for example, Idelalisib, Levoketoconazole, Pexidartinib. The full list is on the Flutamide page.
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