What the FDA labels say about taking them together
Mycophenolic acid and valganciclovir
Mycophenolic acid's FDA label of July 29, 2026 names valganciclovir in its drug interactions section; the valganciclovir label PlainMeds reads does 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 mycophenolic acid FDA label on DailyMed (effective July 29, 2026, Novartis Pharmaceuticals Corporation); the valganciclovir FDA label on DailyMed (effective December 8, 2025, H2-Pharma, LLC).
What does the mycophenolic acid label say about valganciclovir?
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
What does the valganciclovir label say about mycophenolic acid?
Valganciclovir's label (effective December 8, 2025) does 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 (Valcyte), NDA021304 (Cheplapharm), as published by H2-Pharma, LLC, effective December 8, 2025 (SPL set 4c517a39-2ded-4c5a-8d56-276853414b31), 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
| Mycophenolic acid | Valganciclovir | |
|---|---|---|
| Labeled for | Organ transplant rejection | n/a |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.0996 per tablet 180 mg tablet | $1.91 per tablet 450 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