Drug interactions
Maribavir + Valganciclovir
Severity: Major
Maribavir and Valganciclovir: 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
Maribavir may reduce the antiviral activity of valganciclovir, the prodrug of ganciclovir, against cytomegalovirus. This could lead to treatment failure.
What this interaction means in plain words
Maribavir and Valganciclovir 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.
Maribavir belongs to Anti Virals; Valganciclovir belongs to Anti Virals.
Why it happens
Maribavir inhibits the viral UL97 kinase, which is needed to phosphorylate ganciclovir to its active form.
What to do
Do not coadminister; choose one agent according to the treatment plan. Monitor CMV viral load if switching therapies.
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 Maribavir
- Ganciclovir + Maribavir Major
- Maribavir + Rifampicin Major
- Carbamazepine + Maribavir Moderate
- Digoxin + Maribavir Moderate
- Maribavir + Phenytoin Moderate
Other interactions of Valganciclovir
Frequently asked questions
Can I take Maribavir with Valganciclovir?
MediHelp rates the interaction as major. Maribavir and Valganciclovir 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. Maribavir may reduce the antiviral activity of valganciclovir, the prodrug of ganciclovir, against cytomegalovirus. This could lead to treatment failure.
How serious is the interaction between Maribavir and Valganciclovir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not coadminister; choose one agent according to the treatment plan. Monitor CMV viral load if switching therapies.
What other medicines interact with Maribavir?
MediHelp also lists interactions of Maribavir with, for example, Ganciclovir, Rifampicin, Carbamazepine. The full list is on the Maribavir page.
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