What the FDA labels say about taking them together
Eltrombopag and irinotecan
Eltrombopag's FDA label of December 18, 2025 names irinotecan in its drug interactions section; the irinotecan labels PlainMeds reads (2) do not name eltrombopag.
Check it at the source: the eltrombopag FDA label on DailyMed (effective December 18, 2025, Novartis Pharmaceuticals Corporation); the irinotecan FDA label on DailyMed (effective May 12, 2026, Pharmacia & Upjohn Company LLC).
What does the eltrombopag label say about irinotecan?
Eltrombopag label, drug interactionsUse caution when concomitantly administering PROMACTA and drugs that are substrates of OATP1B1 (e.g., atorvastatin, bosentan, ezetimibe, fluvastatin, glyburide, olmesartan, pitavastatin, pravastatin, rosuvastatin, repaglinide, rifampin, simvastatin acid, SN-38 [active metabolite of irinotecan], valsartan) or breast cancer resistance protein (BCRP) (e.g., imatinib, irinotecan, lapatinib, methotrexate, mitoxantrone, rosuvastatin, sulfasalazine, topotecan).
Source: FDA drug label (Alvaiz, NDA216774), Teva Pharmaceuticals, Inc., effective January 1, 2026 (SPL set ed51e463-7a03-4858-bbd2-882ce4753d5a), via openFDA
Source: FDA drug label (PROMACTA), Novartis Pharmaceuticals Corporation, effective December 18, 2025 (SPL set 7714a0ed-34bb-46e6-a0a5-b363908b22c2), via openFDA; the full label on DailyMed
What does the irinotecan label say about eltrombopag?
Irinotecan's label (effective May 12, 2026) and its 1 other brand-application label do not name eltrombopag in these sections. A label lists what its studies and reports found; it is not a complete list.
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
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
| Eltrombopag | Irinotecan | |
|---|---|---|
| Labeled for | Anemia | Colorectal cancer |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $25.85 per tablet 50 mg tablet | n/a |
| Shortage now | No current entry | 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