What the FDA labels say about taking them together
Brincidofovir and cidofovir
Brincidofovir's FDA label of July 1, 2025 names cidofovir in its warnings and precautions section; the cidofovir label PlainMeds reads does not name brincidofovir.
Check it at the source: the brincidofovir FDA label on DailyMed (effective July 1, 2025, Emergent BioDefense Operations Lansing LLC); the cidofovir FDA label on DailyMed (effective October 25, 2023, Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc.).
What does the brincidofovir label say about cidofovir?
Brincidofovir label, warnings and precautionsCoadministration with Related Products: TEMBEXA should not be coadministered with intravenous cidofovir.
Source: FDA drug label (Tembexa), Emergent BioDefense Operations Lansing LLC, effective July 1, 2025 (SPL set 209aa94b-c613-4880-ad89-41be83d12c0a), via openFDA; the full label on DailyMed
What does the cidofovir label say about brincidofovir?
Cidofovir's label (effective October 25, 2023) does not name brincidofovir in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (CIDOFOVIR DIHYDRATE), Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc., effective October 25, 2023 (SPL set 44966a7e-d777-40fb-956f-d0f31f737848), 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
| Brincidofovir | Cidofovir | |
|---|---|---|
| Labeled for | n/a | n/a |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | n/a | 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