What the FDA labels say about taking them together
Ethinyl estradiol/ferrous bisglycinate/levonorgestrel and topiramate
Ethinyl estradiol/ferrous bisglycinate/levonorgestrel's FDA label of January 9, 2025 names topiramate in its drug interactions section; the topiramate labels PlainMeds reads (4) do not name ethinyl estradiol/ferrous bisglycinate/levonorgestrel. The ethinyl estradiol/ferrous bisglycinate/levonorgestrel label: “… carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. John's wort.”
Check it at the source: the ethinyl estradiol/ferrous bisglycinate/levonorgestrel FDA label on DailyMed (effective January 9, 2025, Lupin Pharmaceuticals, Inc.); the topiramate FDA label on DailyMed (effective June 1, 2026, Sun Pharmaceutical Industries, Inc.).
What does the ethinyl estradiol/ferrous bisglycinate/levonorgestrel label say about topiramate?
Ethinyl estradiol/ferrous bisglycinate/levonorgestrel label, drug interactionsSome drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate, rifabutin, rufinamide, aprepitant, and products containing St. John's wort.
Source: FDA drug label (MINZOYA), Lupin Pharmaceuticals, Inc., effective January 9, 2025 (SPL set d5ebd7fa-c388-4619-8dcb-e862e4ce5285), via openFDA; the full label on DailyMed
What does the topiramate label say about ethinyl estradiol/ferrous bisglycinate/levonorgestrel?
Topiramate's label (effective June 1, 2026) and its 3 other brand-application labels do not name ethinyl estradiol/ferrous bisglycinate/levonorgestrel in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Topiramate), Sun Pharmaceutical Industries, Inc., effective June 1, 2026 (SPL set 3c909a53-ae66-4b28-a741-b60bb25a69cf), 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
| Ethinyl estradiol/ferrous bisglycinate/levonorgestrel | Topiramate | |
|---|---|---|
| Labeled for | Birth control | Seizures and epilepsy, Migraine |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $3.45 per tablet 28 tablet | $0.0567 per tablet 100 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