What the FDA labels say about taking them together
Dexamethasone and ivosidenib
Ivosidenib's FDA label of December 22, 2025 names dexamethasone in its warnings and precautions section; the dexamethasone labels PlainMeds reads (4) do not name ivosidenib. The ivosidenib label: “If differentiation syndrome is suspected, initiate dexamethasone 10 mg IV every 12 hours and hemodynamic monitoring until improvement.”
Check it at the source: the dexamethasone FDA label on DailyMed (effective June 6, 2025, Hikma Pharmaceuticals USA, Inc.); the ivosidenib FDA label on DailyMed (effective December 22, 2025, Servier Pharmaceutical LLC).
What does the dexamethasone label say about ivosidenib?
Dexamethasone's label (effective June 6, 2025) and its 3 other brand-application labels do not name ivosidenib in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Dexamethasone Intensol), Hikma Pharmaceuticals USA, Inc., effective June 6, 2025 (SPL set b15200fb-1826-472b-a907-e677a272513b), via openFDA; the full label on DailyMed
What does the ivosidenib label say about dexamethasone?
Ivosidenib label, warnings and precautionsIf differentiation syndrome is suspected, initiate dexamethasone 10 mg IV every 12 hours (or an equivalent dose of an alternative oral or IV corticosteroid) and hemodynamic monitoring until improvement [see Dosage and Administration (2.3) ].
Source: FDA drug label (TIBSOVO), Servier Pharmaceutical LLC, effective December 22, 2025 (SPL set 65d254c0-67ad-42c4-b972-ad463b755b2d), 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
| Dexamethasone | Ivosidenib | |
|---|---|---|
| Labeled for | Asthma, Eczema (atopic dermatitis), Leukemia, lymphoma and myeloma, Herpes and shingles, Crohn's disease and ulcerative colitis, Multiple sclerosis, Osteoarthritis, Rheumatoid arthritis, Psoriasis, Allergies, Anemia, Pain | Leukemia, lymphoma and myeloma |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $0.193 per tablet 4 mg tablet | n/a |
| Shortage now | In shortage | 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