What the FDA labels say about taking them together
Irinotecan and itraconazole
Irinotecan's FDA label of May 12, 2026 names itraconazole in its drug interactions section, and itraconazole's label names irinotecan too. The itraconazole label: “Antineoplastics Irinotecan Contraindicated during and 2 weeks after SPORANOX ® treatment.”
Check it at the source: the irinotecan FDA label on DailyMed (effective May 12, 2026, Pharmacia & Upjohn Company LLC); the itraconazole FDA label on DailyMed (effective July 13, 2026, Janssen Pharmaceuticals, Inc.).
What does the irinotecan label say about itraconazole?
Irinotecan label, drug interactionsCoadministration of CAMPTOSAR with other inhibitors of CYP3A4 (e.g., clarithromycin, indinavir, itraconazole, lopinavir, nefazodone, nelfinavir, ritonavir, saquinavir, telaprevir, voriconazole) or UGT1A1 (e.g., atazanavir, gemfibrozil, indinavir) may increase systemic exposure to irinotecan or SN-38.
Source: FDA drug label (Onivyde, NDA207793), Ipsen Biopharmaceuticals, Inc., effective March 3, 2025 (SPL set c8b58efa-1820-48a4-b70d-62918fc4abfc), via openFDA
Source: FDA drug label (Camptosar), NDA020571 (Pfizer Inc), as published by Pharmacia & Upjohn Company LLC, effective May 12, 2026 (SPL set e518dfc6-7e93-4fee-a66c-51e1ab71c056), via openFDA; the full label on DailyMed
What does the itraconazole label say about irinotecan?
Itraconazole label, boxed warningSome examples of drugs that are contraindicated for coadministration with SPORANOX ® Capsules are: methadone, disopyramide, dofetilide, dronedarone, quinidine, isavuconazole, ergot alkaloids (such as dihydroergotamine, ergometrine (ergonovine), ergotamine, methylergometrine (methylergonovine)), irinotecan, lurasidone, oral midazolam, pimozide, triazolam, felodipine, nisoldipine, ivabradine, ranolazine, eplerenone, cisapride, naloxegol, lomitapide, lovastatin, simvastatin, avanafil, ticagrelor, finerenone, voclosporin.
Itraconazole label, drug interactionsAntineoplastics Irinotecan Contraindicated during and 2 weeks after SPORANOX ® treatment.
Tolsura label (Mayne Pharma Commercial LLC, April 23, 2025), drug interactionsConcomitant drug dose reduction may be necessary Antineoplastics Irinotecan Contraindicated during and 2 weeks after TOLSURA treatment.
Source: FDA drug label (Tolsura, NDA208901), Mayne Pharma Commercial LLC, effective April 23, 2025 (SPL set 306352d1-9d5a-49ad-b72d-893b99546861), via openFDA
Source: FDA drug label (SPORANOX), Janssen Pharmaceuticals, Inc., effective July 13, 2026 (SPL set a4d555fa-787c-40fb-bb7d-b0d4f7318fd0), 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
| Irinotecan | Itraconazole | |
|---|---|---|
| Labeled for | Colorectal cancer | Fungal infections |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | n/a | $0.910 per capsule 100 mg capsule |
| Shortage now | A presentation being discontinued | A presentation being discontinued |
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