What the FDA labels say about taking them together
Dexamethasone and fosaprepitant
Fosaprepitant's FDA label of July 29, 2026 names dexamethasone in its drug interactions section; the dexamethasone labels PlainMeds reads (4) do not name fosaprepitant. The fosaprepitant label: “Clinical Impact; Increased dexamethasone exposure.”
Check it at the source: the dexamethasone FDA label on DailyMed (effective June 6, 2025, Hikma Pharmaceuticals USA, Inc.); the fosaprepitant FDA label on DailyMed (effective July 29, 2026, AVYXA Pharma, LLC).
What does the dexamethasone label say about fosaprepitant?
Dexamethasone's label (effective June 6, 2025) and its 3 other brand-application labels do not name fosaprepitant 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 fosaprepitant label say about dexamethasone?
Fosaprepitant label, drug interactionsClinical Impact; Increased dexamethasone exposure [see ].
Focinvez label (Steriscience Specialties Private Limited, March 30, 2026), drug interactionsClinical Impact; Increased dexamethasone exposure [see Clinical Pharmacology ()].
Source: FDA drug label (Focinvez, NDA216686), Steriscience Specialties Private Limited, effective March 30, 2026 (SPL set 18a60093-cec8-1b8c-e063-6394a90a8902), via openFDA
Source: FDA drug label (NAVITRUX), AVYXA Pharma, LLC, effective July 29, 2026 (SPL set a41b7c3a-1376-43a7-b5b9-6ba2eba1e169), 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 | Fosaprepitant | |
|---|---|---|
| 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 | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $0.193 per tablet 4 mg tablet | n/a |
| Shortage now | In shortage | 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