What the FDA labels say about taking them together
Ganciclovir and maribavir
Maribavir's FDA label of January 27, 2026 names ganciclovir in its drug interactions section; the ganciclovir labels PlainMeds reads (2) do not name maribavir. The maribavir label: “Coadministered with Ganciclovir or Valganciclovir LIVTENCITY is not recommended to be coadministered with valganciclovir/ganciclovir (vGCV/GCV).”
Check it at the source: the ganciclovir FDA label on DailyMed (effective January 9, 2026, Fresenius Kabi USA, LLC); the maribavir FDA label on DailyMed (effective January 27, 2026, Takeda Pharmaceuticals America, Inc.).
What does the ganciclovir label say about maribavir?
Ganciclovir's label (effective January 9, 2026) and its 1 other brand-application label do not name maribavir in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Ganciclovir), Fresenius Kabi USA, LLC, effective January 9, 2026 (SPL set 35addab5-09db-4f8a-9c69-6fbce33ecc37), via openFDA; the full label on DailyMed
What does the maribavir label say about ganciclovir?
Maribavir label, drug interactionsCoadministered with Ganciclovir or Valganciclovir LIVTENCITY is not recommended to be coadministered with valganciclovir/ganciclovir (vGCV/GCV).
Maribavir label, warnings and precautionsWARNINGS AND PRECAUTIONS LIVTENCITY may antagonize the antiviral activity of ganciclovir and valganciclovir.
Source: FDA drug label (Livtencity), Takeda Pharmaceuticals America, Inc., effective January 27, 2026 (SPL set c94fc2c5-e840-4f18-b7d8-d5eacb26d3a0), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Ganciclovir | Maribavir | |
|---|---|---|
| Labeled for | n/a | n/a |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $91.24 per gram 0.15% ophthalmic gel | n/a |
| Shortage now | No current entry | No current entry |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once