What the FDA labels say about taking them together
Drospirenone/ethinyl estradiol and erythromycin
Drospirenone/ethinyl estradiol's FDA label of May 29, 2025 names erythromycin in its drug interactions section; the erythromycin labels PlainMeds reads (4) do not name drospirenone/ethinyl estradiol. The drospirenone/ethinyl estradiol label: “Concomitant administration of moderate or strong CYP3A4 inhibitors such as azole antifungals, verapamil, macrolides, diltiazem, and grapefruit juice can increase the plasma concentrations of the estrogen or the …”
Check it at the source: the drospirenone/ethinyl estradiol FDA label on DailyMed (effective May 29, 2025, Bayer HealthCare Pharmaceuticals Inc.); the erythromycin FDA label on DailyMed (effective August 1, 2024, Teva Pharmaceuticals USA, Inc.).
What does the drospirenone/ethinyl estradiol label say about erythromycin?
Drospirenone/ethinyl estradiol label, drug interactionsConcomitant administration of moderate or strong CYP3A4 inhibitors such as azole antifungals (e.g., ketoconazole, itraconazole, voriconazole, fluconazole), verapamil, macrolides (e.g., clarithromycin, erythromycin), diltiazem, and grapefruit juice can increase the plasma concentrations of the estrogen or the progestin or both.
Source: FDA drug label (Yaz), Bayer HealthCare Pharmaceuticals Inc., effective May 29, 2025 (SPL set 065f33e4-b587-4e66-b896-ca9ab7b7c876), via openFDA; the full label on DailyMed
What does the erythromycin label say about drospirenone/ethinyl estradiol?
Erythromycin's label (effective August 1, 2024) and its 3 other brand-application labels do not name drospirenone/ethinyl estradiol in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Erythromycin), Teva Pharmaceuticals USA, Inc., effective August 1, 2024 (SPL set 75a0bd5a-d09f-483b-bfd8-f8343b149eb2), 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
| Drospirenone/ethinyl estradiol | Erythromycin | |
|---|---|---|
| Labeled for | Acne, Birth control | Bacterial infections, Acne |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $0.151 per tablet 3-0.03 mg tablet | $1.96 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