What the FDA labels say about taking them together
Ganciclovir and mycophenolic acid
Mycophenolic acid's FDA label of July 29, 2026 names ganciclovir in its drug interactions section; the ganciclovir labels PlainMeds reads (2) do not name mycophenolic acid. The mycophenolic acid label: “Acyclovir (Valacyclovir), Ganciclovir (Valganciclovir), and Other Drugs That Undergo Renal Tubular Secretion The coadministration of MMF and acyclovir or ganciclovir may increase plasma concentrations of mycophenolic …”
Check it at the source: the ganciclovir FDA label on DailyMed (effective January 9, 2026, Fresenius Kabi USA, LLC); the mycophenolic acid FDA label on DailyMed (effective July 29, 2026, Novartis Pharmaceuticals Corporation).
What does the ganciclovir label say about mycophenolic acid?
Ganciclovir's label (effective January 9, 2026) and its 1 other brand-application label do not name mycophenolic acid 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 mycophenolic acid label say about ganciclovir?
Mycophenolic acid label, drug interactionsAcyclovir (Valacyclovir), Ganciclovir (Valganciclovir), and Other Drugs That Undergo Renal Tubular Secretion The coadministration of MMF and acyclovir or ganciclovir may increase plasma concentrations of mycophenolic acid glucuronide (MPAG) and acyclovir/valacyclovir/ganciclovir/valganciclovir as their coexistence competes for tubular secretion.
Source: FDA drug label (Myfortic), Novartis Pharmaceuticals Corporation, effective July 29, 2026 (SPL set eed26501-890d-4ff6-88e7-6dbea4726e53), 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 | Mycophenolic acid | |
|---|---|---|
| Labeled for | n/a | Organ transplant rejection |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $91.24 per gram 0.15% ophthalmic gel | $0.0996 per tablet 180 mg tablet |
| 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