Drug interactions
Dapsone + Ganciclovir
Severity: Moderate
Dapsone and Ganciclovir: 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
Both dapsone and ganciclovir can suppress bone marrow function, so combined use may increase the risk of anemia, neutropenia and thrombocytopenia. Dapsone also causes dose-related hemolysis and methemoglobinemia, which can add to hematologic burden in patients already receiving ganciclovir.
What this interaction means in plain words
Dapsone and Ganciclovir 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.
Dapsone belongs to Anti Bacterial; Ganciclovir belongs to Anti Virals.
Why it happens
Additive hematologic toxicity (myelosuppression from ganciclovir plus hemolysis and marrow effects from dapsone).
What to do
Monitor complete blood count regularly, including neutrophils, hemoglobin and platelets, during co-therapy. Reduce doses or interrupt one agent if significant cytopenia develops.
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
- Bosentan + Dapsone Moderate
- Bupivacaine implant + Dapsone Moderate
Other interactions of Ganciclovir
Frequently asked questions
Can I take Dapsone with Ganciclovir?
MediHelp rates the interaction as moderate. Dapsone and Ganciclovir 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. Both dapsone and ganciclovir can suppress bone marrow function, so combined use may increase the risk of anemia, neutropenia and thrombocytopenia. Dapsone also causes dose-related hemolysis and methemoglobinemia, which can add to hematologic burden in patients already receiving ganciclovir.
How serious is the interaction between Dapsone and Ganciclovir?
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 complete blood count regularly, including neutrophils, hemoglobin and platelets, during co-therapy. Reduce doses or interrupt one agent if significant cytopenia develops.
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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