What the FDA labels say about taking them together
Dihydroergotamine and zileuton
Dihydroergotamine's FDA label of March 6, 2025 names zileuton in its warnings section; the zileuton labels PlainMeds reads (2) do not name dihydroergotamine.
Check it at the source: the dihydroergotamine FDA label on DailyMed (effective March 6, 2025, Oceanside Pharmaceuticals); the zileuton FDA label on DailyMed (effective July 29, 2022, Strides Pharma Science Limited).
What does the dihydroergotamine label say about zileuton?
Dihydroergotamine label, warningsLess potent inhibitors include saquinavir, nefazodone, fluconazole, grapefruit juice, fluoxetine, fluvoxamine, zileuton, and clotrimazole.
Source: FDA drug label (Trudhesa, NDA213436), Impel Pharmaceuticals LLC, effective September 3, 2026 (SPL set b81397b0-910d-4eb4-8fee-a9a3c9d94d63), via openFDA
Source: FDA drug label (Dihydroergotamine Mesylate), NDA020148 (Bausch), as published by Oceanside Pharmaceuticals, effective March 6, 2025 (SPL set 977de209-c53a-4cb4-9f3f-1e850600a9dc), via openFDA; the full label on DailyMed
What does the zileuton label say about dihydroergotamine?
Zileuton's label (effective July 29, 2022) and its 1 other brand-application label do not name dihydroergotamine in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Zileuton), Strides Pharma Science Limited, effective July 29, 2022 (SPL set a826d16f-df07-447b-b050-b9a02ea1f89e), 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
| Dihydroergotamine | Zileuton | |
|---|---|---|
| Labeled for | Migraine | Asthma |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $29.44 per mL 4 mg/mL nasal spray | $2.05 per tablet 600 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