What the FDA labels say about taking them together
Griseofulvin and porfimer
Porfimer's FDA label of April 28, 2026 names griseofulvin in its drug interactions section; the griseofulvin label PlainMeds reads does not name porfimer. The porfimer label: “The concomitant use of PHOTOFRIN with other photosensitizing agents may increase the risk of a photosensitivity reaction.”
Check it at the source: the griseofulvin FDA label on DailyMed (effective December 10, 2025); the porfimer FDA label on DailyMed (effective April 28, 2026, Pinnacle Biologics, Inc.).
What does the griseofulvin label say about porfimer?
Griseofulvin's label (effective December 10, 2025) does not name porfimer in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Ultramicrosize Griseofulvin), Chartwell RX, LLC., effective December 10, 2025 (SPL set efb8a660-802c-4ca6-bbff-ad7b48b91aef), via openFDA; the full label on DailyMed
What does the porfimer label say about griseofulvin?
Porfimer label, drug interactionsThe concomitant use of PHOTOFRIN with other photosensitizing agents (e.g., tetracyclines, sulfonamides, phenothiazines, sulfonylurea hypoglycemic agents, thiazide diuretics, griseofulvin, and fluoroquinolones) may increase the risk of a photosensitivity reaction.
Source: FDA drug label (Photofrin), Pinnacle Biologics, Inc., effective April 28, 2026 (SPL set 5c4841b4-fbc0-4163-8ee1-cb28629cbfbf), 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
| Griseofulvin | Porfimer | |
|---|---|---|
| Labeled for | Fungal infections | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $3.74 per tablet 250 mg tablet | 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