What the FDA labels say about taking them together
Ganciclovir and sulfamethoxazole/trimethoprim
Ganciclovir's FDA label of January 9, 2026 names sulfamethoxazole/trimethoprim in its drug interactions section; the sulfamethoxazole/trimethoprim labels PlainMeds reads (2) do not name ganciclovir.
Check it at the source: the ganciclovir FDA label on DailyMed (effective January 9, 2026, Fresenius Kabi USA, LLC); the sulfamethoxazole/trimethoprim FDA label on DailyMed (effective December 30, 2024, Sun Pharmaceutical Industries, Inc).
What does the ganciclovir label say about sulfamethoxazole/trimethoprim?
Ganciclovir label, drug interactionsNamed in a table that the FDA label file prints without its column breaks; the full label shows the table.
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 sulfamethoxazole/trimethoprim label say about ganciclovir?
Sulfamethoxazole/trimethoprim's label (effective December 30, 2024) and its 1 other brand-application label do not name ganciclovir in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Bactrim), Sun Pharmaceutical Industries, Inc, effective December 30, 2024 (SPL set f59d0c04-9c66-4d53-a0e1-cb55570deb62), 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 | Sulfamethoxazole/trimethoprim | |
|---|---|---|
| Labeled for | n/a | Bacterial infections, Urinary tract infections, Diarrhea |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $91.24 per gram 0.15% ophthalmic gel | $0.0448 per tablet Sulfamethoxazole-tmp ds 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