Drug interactions
Bosentan + Dapsone
Severity: Moderate
Bosentan and Dapsone: 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
Bosentan induces CYP3A4 and CYP2C9 and may reduce dapsone concentrations. Reduced dapsone efficacy is possible, and both drugs can affect the liver.
What this interaction means in plain words
Bosentan and Dapsone 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.
Bosentan belongs to Miscellaneous; Dapsone belongs to Anti Bacterial.
Why it happens
Bosentan induces CYP3A4, increasing dapsone metabolism.
What to do
Monitor clinical response to dapsone and liver enzymes, as bosentan itself is hepatotoxic.
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 Dapsone
- Bcg vaccine live + Dapsone Major
- Dapsone + Primaquine Major
- Apalutamide + Dapsone Moderate
- Belzutifan + Dapsone Moderate
- Bupivacaine implant + Dapsone Moderate
- Carbamazepine + Dapsone Moderate
Other interactions of Bosentan
- Bosentan + Cyclosporin Contraindicated
- Bosentan + Cyclosporine Contraindicated
- Bosentan + Glyburide Contraindicated
- Bosentan + Glyburide-metformin Contraindicated
- Bosentan + Lonafarnib Contraindicated
- Bosentan + Sparsentan Contraindicated
Frequently asked questions
Can I take Bosentan with Dapsone?
MediHelp rates the interaction as moderate. Bosentan and Dapsone 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. Bosentan induces CYP3A4 and CYP2C9 and may reduce dapsone concentrations. Reduced dapsone efficacy is possible, and both drugs can affect the liver.
How serious is the interaction between Bosentan and Dapsone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response to dapsone and liver enzymes, as bosentan itself is hepatotoxic.
What other medicines interact with Dapsone?
MediHelp also lists interactions of Dapsone with, for example, Bcg vaccine live, Primaquine, Apalutamide. The full list is on the Dapsone page.
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