What the FDA labels say about taking them together
Etonogestrel and griseofulvin
Etonogestrel's FDA label of May 28, 2026 names griseofulvin in its drug interactions section; the griseofulvin label PlainMeds reads does not name etonogestrel. The etonogestrel label: “Some drugs or herbal products that may decrease the effectiveness of HCs include efavirenz, phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin …”
Check it at the source: the etonogestrel FDA label on DailyMed (effective May 28, 2026, Organon LLC); the griseofulvin FDA label on DailyMed (effective December 10, 2025).
What does the etonogestrel label say about griseofulvin?
Etonogestrel label, drug interactionsSome drugs or herbal products that may decrease the effectiveness of HCs include efavirenz, phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. John's wort.
Source: FDA drug label (Nexplanon), Organon LLC, effective May 28, 2026 (SPL set 487f8a62-e142-457c-97cc-2e398fde7594), via openFDA; the full label on DailyMed
What does the griseofulvin label say about etonogestrel?
Griseofulvin's label (effective December 10, 2025) does not name etonogestrel 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
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
| Etonogestrel | Griseofulvin | |
|---|---|---|
| Labeled for | Birth control | Fungal infections |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | n/a | $3.74 per tablet 250 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