What the FDA labels say about taking them together
Granisetron and ketoconazole
Granisetron's FDA label of August 31, 2017 names ketoconazole in its drug interactions section; the ketoconazole label PlainMeds reads does not name granisetron.
Check it at the source: the granisetron FDA label on DailyMed (effective August 31, 2017, Mylan Institutional LLC); the ketoconazole FDA label on DailyMed (effective January 28, 2026, E. Fougera & Co. a division of Fougera Pharmaceuticals, LLC).
What does the granisetron label say about ketoconazole?
Granisetron label, drug interactionsIn in vitro human microsomal studies, ketoconazole inhibited ring oxidation of granisetron hydrochloride.
Source: FDA drug label (Granisetron Hydrochloride), Mylan Institutional LLC, effective August 31, 2017 (SPL set 8d88adba-7f5e-4e97-84b3-6ca8ec98c023), via openFDA; the full label on DailyMed
What does the ketoconazole label say about granisetron?
Ketoconazole's label (effective January 28, 2026) does not name granisetron in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (ketoconazole), E. Fougera & Co. a division of Fougera Pharmaceuticals, LLC, effective January 28, 2026 (SPL set cad7c647-34a9-4e4e-83b3-8d78e58f588f), 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
| Granisetron | Ketoconazole | |
|---|---|---|
| Labeled for | Nausea and vomiting | Fungal infections |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $1.31 per tablet 1 mg tablet | $0.249 per gram 2% cream |
| 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