What the FDA labels say about taking them together
Maribavir and rifampin
Maribavir's FDA label of January 27, 2026 names rifampin in its drug interactions section; the rifampin label PlainMeds reads does not name maribavir. The maribavir label: “Coadministration of LIVTENCITY and rifampin is not recommended due to potential for a decrease in efficacy of LIVTENCITY.”
Check it at the source: the maribavir FDA label on DailyMed (effective January 27, 2026, Takeda Pharmaceuticals America, Inc.); the rifampin FDA label on DailyMed (effective February 11, 2026, Lupin Pharmaceuticals, Inc.).
What does the maribavir label say about rifampin?
Maribavir label, drug interactionsConcomitant Drug Class/Drug Name: Rifampin; Effect on Concentration: ↓ Maribavir; Clinical Comments: Coadministration of LIVTENCITY and rifampin is not recommended due to potential for a decrease in efficacy of LIVTENCITY.
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
What does the rifampin label say about maribavir?
Rifampin's label (effective February 11, 2026) does 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 (rifampin), Lupin Pharmaceuticals, Inc., effective February 11, 2026 (SPL set b56004f0-f23d-47f6-80c7-39884fccbccc), 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
| Maribavir | Rifampin | |
|---|---|---|
| Labeled for | n/a | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | n/a | $0.679 per capsule 300 mg capsule |
| Shortage now | No current entry | In shortage |
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